Douggg said in post #37:
The person's religion has to be Judaism in order for the Jews to embrace him as their messiah.
Are you thinking of John 5:43b?
If so, note that nothing requires John 5:43b refers to the future Antichrist, instead of to a future, ultra-Orthodox Jewish false "Messiah" in Israel whom the Antichrist will "cut" a 7-year peace treaty with (Daniel 9:26a,27a), after the Antichrist defeats him and his followers (Daniel 11:22-23a).
Anyone who receives the Antichrist (the individual-man aspect of Revelation's "beast") can never be saved (Revelation 14:9-11), whereas there will be Jews who will be saved after the time of the Antichrist, at Jesus Christ's future, Second Coming (Romans 11:26, Zechariah 12:10-14). Therefore, not all Jews will receive the Antichrist. They could survive his reign by hiding from him. And those in Jerusalem could be protected from him by the future, Two Witnesses (of Revelation 11:3,5).
Douggg said in post #37:
The person's religion has to be Judaism in order for the Jews to embrace him as their messiah.
Note that the Antichrist (the individual-man aspect of Revelation's "beast"), during his future, literal 3.5-year worldwide reign (Revelation 13:5-18), won't support Judaism in its past and current form, insofar as Judaism worships YHWH (Deuteronomy 6:4-5), while the Antichrist will utterly revile YHWH (Daniel 11:36, Revelation 13:5). And Judaism rejects Lucifer/Satan as being evil (Zechariah 3:2, Isaiah 14:12), while the Antichrist will bring the world into the conscious and open worship of Lucifer/Satan (the dragon) (Revelation 13:4, Revelation 12:9). And Judaism forbids the worship of any images (Leviticus 26:1), while the Antichrist will have an image made of himself to be worshipped (Revelation 13:15).
Regarding the idea of the Antichrist being Jewish by blood, both his parents could be Arabs (if his mother wasn't impregnated by Satan). But from some long-ago ancestor, the Antichrist could also have some Jewish blood in him, from the tribe of Dan (Genesis 49:17), which could be the reason the tribe of Dan isn't included in the 12 tribes of the 144,000 (Revelation 7:4-8; there, "Joseph" stands for Ephraim: Numbers 1:32, Psalms 78:67, Ezekiel 37:16b,19).
The Antichrist (the individual-man aspect of Revelation's "beast") could have grown up as a Druze Arab, in Lebanon, in the modern city of Tyre (Ezekiel 28:2; 2 Thessalonians 2:4). So he could at first present himself to the world as being of the (quasi-Islamic) Druze religion, which is waiting for the second coming of a God-man named Hakim. The Antichrist's last name could be Hakim, and he could at first present himself to the Druze people as the fulfillment of the second coming of this God-man. In this way, he could get the Druze to support him without question during an initial rise to power among the Arabs. The Druze Arabs could be the numerically "small people" of Daniel 11:23. The Antichrist could make them his completely devoted bodyguard, and buy them many key positions of power within a future, United Arab States (which the Antichrist could become the leader of in the 1st stage of his world takeover), and employ the Druze as loyal spies and assassins at every level of his United Arab government and military.
The Druze religion is very secretive. What it teaches to its higher-level initiates isn't even taught to its lower-level initiates. What it could teach to its higher-level initiates could basically be Gnosticism mixed in with the Hakim God-man idea. The Antichrist himself, while outwardly a Druze, could inwardly be a Gnostic Luciferian. He could be a highest-level initiate of a worldwide secret society which ultimately teaches Gnostic Luciferianism, but keeps this a secret even from its own members who haven't been initiated into its highest level.