All three religions teach that there is only one God. The nature of that God is not the same in the three religions, though.
they all believe in one God
Islam. It claims that it is the continuEation of Judaism and CHRISTIANITY
Islam, Judaism and Christianity.
Same religion ( Christianity, Judaism, Buddhism,Hinduism, and Islam
Both Islam and Christianity originated out of Judaism.
The connection between Islam, Christianity and Judaism is that the three religions trace their history to the covenant between God and Abraham.
The question should be " What does Christianity have to do with Jews (or Judaism)?" Judaism is like a tree where Christianity is its branch and Islam is it leaves. Christianity is based on Judaism and Islam is based on Christianity. The major difference between the three is that Judaism doesn't have jesus in it unlike Christianity and Islam.
Judaism and Islam have many similarities. Hinduism does not fall in this category because Hinduism is an Ancient South Asian Religion and Culture. Judaism and Islam believe in One God. Hinduism does not fall in this category, because they believe in many gods. Judaism and Islam have too many similarities to list. It would be wise to search "Similarities between Judaism and Islam" or see the related question below.
Christianity: Son of God (Messiah) Islam: Prophet Judaism: False messiah
Judaism, Christianity, and Islam have all claimed the Holy Land for themselves.
Judaism, Christianity, and Islam religions.
For Judaism and Christianity it is Jerusalem. For Islam it is Mecca.
-- Islam -- Judaism -- Christianity