Question

4.) How are the basic beliefs of Judaism, Christianity, and Islam alike?

Answer 1

They are all monotheistic, and They all share the old testimate, and in reality all follow the same God. Basically they all believe in all of the Prophets, etc until up to Jesus. Also
All three believe in ONE God.

All three have Jerusalem as a Holy place.

All three have prophets though they don't all accept the same prophets.

All three have Holy texts again they don't all accept each other's Holy texts.

also The Golden Rule comes to mind, and treat others as you would like to be treated. And finally , They believe in one God and worship him, Christians say: Jesus is a God, Holy spirit, the father, all these can be one. Jews say: the true Jesus would come in the future but they believe in one God. Muslims say: Jesus is prophet and Moses is a prophet and Muhammad is prophet, but there's one God, they also believe that God rules are the same, but Gospel&Torah have been changed, so Jesus was a Muslim, Moses, Noah, Muhammad..etc, and all true God worshiper are Muslims even if they did not hear about Islam. but they believe in one God and his messengers, so they are Muslims