The religion of Moosa, ‘Eesa and all the Prophets was, generally speaking, Islam, which means believing in the Oneness of Allaah (Tawheed) and worshipping Him alone with no partner or associate, as Allaah says (interpretation of the meaning):
“Truly, the religion with Allaah is Islam”
[Aal ‘Imraan 3:19]
“And whoever seeks a religion other than Islam, it will never be accepted of him, and in the Hereafter he will be one of the losers”
[Aal ‘Imraan 3:85]
And He tells us that Nooh (peace be upon him) said (interpretation of the meaning):
“and I have been commanded to be of the Muslims (i.e. those who submit to Allaah’s Will)”
[Yoonus 10:72]
And He tells us of Ibraaheem (peace be upon him) (interpretation of the meaning):
“Ibraaheem (Abraham) was neither a Jew nor a Christian, but he was a true Muslim Haneefa (Islamic Monotheism — to worship none but Allaah Alone) and he was not of Al‑Mushrikoon”
[Aal ‘Imraan 3:67]
And He tells us that Moosa (peace be upon him) said (interpretation of the meaning):
“ ‘O my people! If you have believed in Allaah, then put your trust in Him if you are Muslims (those who submit to Allaah’s Will)’”
[Yoonus 10:84]
And He tells us that Yoosuf (peace be upon him) said (interpretation of the meaning):
“ ‘Cause me to die as a Muslim (the one submitting to Your Will), and join me with the righteous’”
[Yoosuf 12:101]
So it cannot be said of Moosa that his religion was Judaism, rather his religion was Islam, and his followers were called Jews (al-Yahood) because they said Hidna ilayka i.e., we have repented and come back; or because they are called after Yehoodhah (Judah) the oldest of the sons of Ya’qoob (Jacob – peace be upon him). Similarly, the religion of ‘Eesa (peace be upon him) was Islam, not Christianity. The Christians (al-Nasaarah) are his followers who supported him (nasaruhu).
But he (peace be upon him) was a follower of the Tawraat (Torah), who followed and affirmed it, because he was one of the Children of Israel, to whom Moosa (peace be upon him) had been sent, then Allaah revealed to him the Injeel (Gospel) in which was a confirmation of what was in the Torah, as stated above.
What we have mentioned means that the religion brought by ‘Eesa was Islam, if what the questioner meant was to find out and ask about his religion.
But if he was asking about the lineage of the Messiah (peace be upon him) and the people among whom he was born and to whom he was sent, then the Prophet of Allaah ‘Eesa (peace be upon him) was indisputably one of the Children of Israel, the Children of Israel who subsequently became known as the Jews, as we have indicated above.
What the scholars state here is that he is to be attributed to his lineage and people, so it may be said that he was one of the Children of Israel. As for the word “Jew”, it is used to refer to a specific religion, so it should be avoided when referring to ‘Eesa (peace be upon him), even though we know that his people were the Children of Israel who used to follow the law of the Torah before him, and he came to confirm what was in it except for a few rulings which he changed.