@
Constantineman
To give you som overview:
God was always present...from the first human Adam as untill the last...and He has been in touch with us on a regularly basis by sending prophets and by keeping us updated.
So the believe in the one true God was always there...but the earlier prophets might have had a slightly different set of rules than the prophets later on, because human kind has been developing since then and needed extra clarification on some subjects.
an example of this is forbidding alcohol because in Adam as time alcohol was not discovered yet...and you can not forbid something which is not even discovered yet. The same with homosexuality. before Prophet Lot, homosexuality never was a problem.
Every time people wandered off...started believing in other Gods, the original message got lost or deliberately got changed by humans or when humans needed an update, a new false religion was born. So God send a new prophet to guide them back to the one true religion. the old set of rules was then declared invalid and the new set of rules were valid.
So that is why almost all religions on Earth have something in common with each other, especially Christianism, Judaism and Islam. but since the come of Muhammed sas and brought the Quraan to us, every other religion on Earth is outdated and invalid.
in other words:
Muslims are just people who believe in the one true God...throughout the history, even before Muhammad sas...
Judaism and Christianity were once this true religion before people started to add innovation and changed rules that benefitted them.
Can Jesus as be called a Jew? no, because one of the very reasons why He was sent to Earth was because the Jews have already been wandered off the right path and have been adding to much innovation and changed their religion.
Jesus as came to Earth to guide those jews and pagans back to the true religion.
one other thing:
The Thorah is the holy book of the Jews which still contains some truth, but the Talmud, which is totally written by rabbies, is totally a human fabrication and therefore has absolute zero value.