nostr:npub1m8d6pcrjhke48hasqgx7zkgjdt68u60px04frw753697mcmnyr3q365d6q I forgot the most important part, they are going to do it from Jerusalem in the rebuilt 3rd Temple where animal sacrifice will be re-instituted. But first they have to destroy Al Aqsa Mosque which is sitting on the "temple site".

But on to your question. Because Yahweh said so. They are his "chosen people" ever since he took Abraham out of the Land of Ur and gave him the land of Canaan. It's in the Old Testament.