How is Christianity different from both Judaism and Islam?

Answer 1

Answer 1
The primary distinction between Judaism and Islam on the one hand and Christianity on the other centres on the nature of Jesus.

To Christians Jesus is God in human form, fully human and fully divine at the same time. His death on the cross served as payment for all human sin both before and after that event; this in Christian doctrine enables humanity to overcome the sin of Adam (original sin) and achive salvation.
Christians also believe that Jesus was the Messiah (Christ in Greek) fortold by the prophets of the Old Testament.

Jews are still awaiting the Messiah and, in general, have no place for Jesus in their theology as his ideas are heretical to the Judaism of his time.

In Islam Jesus is a great prophet (although not divine) greater that all the others save The Prophet (صلى الله عليه وسلم).

The trinitarian nature of the Christian God has also called some problems for Judaic and Islamic theologians.

To a Christian the three aspects of the deity (Father, Son and Holy Spirit) are all the same God in different natures. The Father creator, the Son God incarnate, and the Spirit that guides mankind.
There have been accusations by Judaic and Islamic scholars that this verges on (or indeed is) polytheism.

There are several other differences but these are probably the central ones.

Answer 2
The main difference is that Christianity believes that God and a human woman produced a child that became the Saviour of the world. Judaism and Islam both believe that God cannot mate with a woman and produce an offspring.

Answer 2

Judaism is different from Islam and Christianity in many ways.

Firstly, the Jewish conception of God is of a singular unity whose name is not used. Christianity believes in a God composed of a Trinity and Islam believes in a God who is addressed by the title "God" (Allah in Arabic) but no specific name.

Judaism holds no formal view of Jesus Christ because he is irrelevant in Judaism whereas he is important in both Christianity and Islam, even though both hold two very different views of who he is and what his message was.

Answer 3

Muslims believe in the messiah Jesus and believe in his second coming. They also believe Mary was a virgin and Jesus was a blessed birth from his Virgin mother Mary.

Aside from Islam considering Jesus to be a prophet, other key differences between Islam and Judaism are the Muslim belief in the existence of the devil, hell, and damnation, none of which exist in the teachings of Judaism.
I'm no expert but i believe its because Islam is mostly centered around the prophet Mohamed. Both Judaism and Christianity argue that God did not give a special, final revelation to Muhammad.

Judaism - worship only one God but Jesus is not the messenger. Reject him.

Christianity - Jesus is not only the messenger but he actually is God. Worship Jesus

Islam - worship only one God and accept Jesus as the messenger of that God but don't confuse the messenger with God.