I heard a Jewish Rabbi say last night that we are not in Heaven very long. The earth will burn, the seas will be no more. The new Jerruselam?

That is right. After the millennial kingdom, we will live in the New Jerusalem on the New Earth and in the New Heaven. For the old heaven and the old earth will pass away.

Basically, the Third Temple in Jerusalem will include 8 chambers; one chamber for Gnostics, one for Muslims, etc. So, antichrist will be crowned here. The Patriarch who crowns him will say that this is the antichrist when antichrist takes off his gloves to cross himself (antichrist has very big nails). Antichrist will kill him. Some people will reject the antichrist based on this. Muslims will believe that antichrist is a returned Mohammad while Buddhists will believe that the antichrist is Buddha. Deceived Christians will say: "Christ is here, Christ is there" when antichrist flies at the speed of light (so to speak). Antichrist is master illusionist. People will see that he supposedly moves mountains (it's a hologram) and even touch "these mountains". Don't be deceived. 666 is not forgivable; it leads to permanent hell. 666 is given with World Passport with no name on it (grey plastic card). Police 666 people on highways. Food stores and prisoners 666 people too. Reject vaccines. Don't go into UFO to be healed by demons. Hide with Orthodox Christians to escape 666. When Enoch and Elijah are resurrected (after antichrist kills them), Jesus will come back to kill the antichrist. Forgive me.

No, he's predicting the end of the world. Heaven is forever in Judaism

Who said this?

In other words, what's his name so we can verify he said this and that he is a real rabbi.