What cost us our homeland was the fact that there were some ultra-fanatic Jews at that time which attacked the Romans in the belief that God was on their side and the Romans wouldn't win. The first time this led to the burning down of the Beit Hamikdash. The second time some Jews tried the same trick on the Romans, it was the time of Bar Kocha, falsely today falsely thought a hero, back then falsely thought a messianic person or even the Messiah himself. With the blessing of Rabbi Akiva (Akiva gave him this name: son of the stars), they carried out a rebellion which led to the total destruction of Jerusalem (which was rebuilt as a Roman city with the name Aelia Capitolina and the substitution of the name Judea with Palaestina by the Romans. Bar Kochba himself is referred to as Bar Koseba (son of the lies) in the rabbinic literature. Here's what religion can also lead to: The total loss of our homeland through blindness for the real world.
Five people killed in car crash near Hebron (Haaretz)
from the article: WZO congress opens in Jerusalem, with new vision for Jewish state