Why are there so many similarities between Islam, Judaism and Christianity?

In a Nutshell: There are many similarities between Islam, Judaism, and Christianity, and these similarities can be traced back to their shared roots in the Abrahamic tradition. All three religions are monotheistic, meaning that they believe in one God, and they all have a strong focus on moral conduct and the importance of faith in God. One of the key similarities between these religions is their belief in one God, who is the creator of the universe and the source of all moral authority. In Islam, this belief is reflected in the belief in Allah, who is described as the one and only God, worthy of all worship and devotion. In Judaism, this belief is reflected in the belief in YHWH, who is seen as the one and only God of Israel. In Christianity, this belief is reflected in the belief in God the Father, who is the creator of all things. "Say, 'He is Allah, [who is] One, Allah, the Eternal Refuge. He neither begets nor is born, nor is there to Him any equivalent'" (Qur'an 112:1-4). "There is no deity except Allah" (Hadith Bukhari, Book 59, Hadith 744). Here are some quotations from Jewish sources that illustrate the belief in one God: "Hear, O Israel: The Lord our God, the Lord is one" (Deuteronomy 6:4). "I am the Lord your God, who brought you out of the land of Egypt, out of the house of slavery" (Exodus 20:2). Here are some quotations from Christian sources that illustrate the belief in one God: "For there is one God, and there is one mediator between God and men, the man Christ Jesus" (1 Timothy 2:5). "And this is eternal life, that they know you, the only true God, and Jesus Christ whom you have sent" (John 17:3). These quotations show that the belief in one God is central to Islam, Judaism, and Christianity, and that each of these religions teaches that there is no deity worthy of worship except the one true God. Another key similarity between these religions is their belief in the importance of moral conduct. All three religions place a strong emphasis on the importance of living a moral and upright life, and they teach that good deeds will be rewarded by God in the afterlife. In Islam, this belief is reflected in the emphasis on the Five Pillars, which are the foundation of the faith and include the declaration of faith, prayer, charity, fasting, and pilgrimage. In Judaism, this belief is reflected in the Ten Commandments and the concept of teshuvah, or repentance. In Christianity, this belief is reflected in the emphasis on following the teachings of Jesus and on living a life of love and compassion. A third key similarity between these religions is their belief in the importance of faith in God. All three religions teach that faith in God is essential for salvation and for a meaningful and fulfilling life. In Islam, this belief is reflected in the importance of submission to the will of Allah and in the belief in the Qur'an as the revealed word of God. In Judaism, this belief is reflected in the importance of Torah study and in the emphasis on obedience to the commandments of God. In Christianity, this belief is reflected in the emphasis on faith in Jesus as the son of God and in the importance of accepting Jesus as one's personal savior. Another key similarity between these religions is their belief in the concept of prophecy and divine revelation. All three religions believe that God has revealed Himself to humanity through prophets, who have received divine guidance and have passed it on to others. In Islam, this belief is reflected in the belief in the prophets of Islam, including Abraham, Moses, and Muhammad. In Judaism, this belief is reflected in the belief in the prophets of Israel, including Abraham, Isaac, and Jacob. In Christianity, this belief is reflected in the belief in the prophets of the Old Testament, as well as in the belief in Jesus as the son of God and the ultimate prophet. There are also many similarities between the practices and rituals of these religions. All three religions have a strong emphasis on prayer and on the importance of worshipping God. In Islam, this is reflected in the daily prayers that are required of Muslims, and in the emphasis on the importance of the Mosque as a place of worship. In Judaism, this is reflected in the importance of the synagogue as a place of worship and in the daily, weekly, and annual prayers that are observed. In Christianity, this is reflected in the importance of the Church as a place of worship and in the emphasis on personal prayer and devotion. Another key similarity between these religions is their belief in the importance of charity and compassion. All three religions teach that it is important to help those in need and to show kindness and compassion to others. In Islam, this belief is reflected in the emphasis on zakat, or charitable giving, and in the importance of helping the poor and disadvantaged. In Judaism, this belief is reflected in the emphasis on tzedakah, or charitable giving, and in the importance of caring for the poor and marginalized. In Christianity, this belief is reflected in the teachings of Jesus about the importance of loving one's neighbor and of helping those in need. There are also many similarities in the festivals and holy days observed by these religions. All three religions have annual festivals that are seen as important times for celebration and for remembering key events in their respective histories. In Islam, this is reflected in the observance of Eid al-Fitr, Eid al-Adha, and other festivals. In Judaism, this is reflected in the observance of Passover, Hanukkah, and other festivals. In Christianity, this is reflected in the observance of Christmas, Easter, and other festivals. A further similarity between these religions is their belief in the importance of the family and in the value of strong interpersonal relationships. All three religions teach that the family is the foundation of society and that it is important to nurture and support healthy relationships with loved ones. In Islam, this belief is reflected in the importance of the extended family and in the emphasis on the role of the husband and wife in building a strong and harmonious home. In Judaism, this belief is reflected in the importance of the family in Jewish life and in the emphasis on the role of parents in raising and educating their children. In Christianity, this belief is reflected in the emphasis on the importance of love and respect within the family and in the importance of strong relationships with others. Finally, there are many similarities between these religions in terms of their beliefs about the afterlife and the concept of salvation. All three religions believe in the existence of an afterlife, and they all teach that how one lives one's life on earth has a bearing on what happens to the soul after death. In Islam, this belief is reflected in the belief in the Day of Judgment, when all people will be judged according to their deeds. In Judaism, this belief is reflected in the belief in the resurrection of the dead and in the concept of the world to come. In Christianity, this belief is reflected in the belief in heaven and hell and in the importance of accepting Jesus as one's personal savior. Conclusion There are many similarities between Islam, Judaism, and Christianity, including their belief in one God, the importance of moral conduct, the importance of faith in God, the belief in prophecy and divine revelation, the importance of prayer and worship, the emphasis on charity and compassion, the observance of festivals and holy days, the importance of the family and strong interpersonal relationships, and the belief in the afterlife and the concept of salvation. These similarities can be traced back to their shared roots in the Abrahamic tradition and reflect the common values and principles that are central to these religions.

I think we have to accept that two of the religions may have copied one of the true religions due to most of them being very similar or they are all from the same God. The first one to have been mentioned is Christianity and it has come before any religion due to that most prophecy has come true and also Jesus is mentioned as one who got crucified while Islam thinks he was a prophet and never got crucified well, scientist and many world historians have found out that there was such a person that was crucified and put in a temple and also Christians also think that but the thing why is there so many similarities.