Why has Israel suffered so much—why did they lose their land and temple and face the Holocaust?
Israel suffered because the nation rejected their Messiah, and thus rejected all the promises. As a result they lost their temple, their land, and were dispersed; they endured ghettos and the Holocaust. Yet God promised He would not give up on them and will yet restore them and fulfill the promises to their forefathers.
Les explains that although no Jew and no Roman took Christ's life—He gave it up of His own will—Peter, by inspiration, accused the nation of Israel of killing their Messiah. Because Israel rejected their Messiah, they lost their temple and land, entered dispersion, suffered in ghettos, and went through the Holocaust, all because they rejected the promises. But God had promised from day one not to give up on them; one day He will bring them back to the land and fulfill all the promises made to their forefathers. In Romans 11 Paul defends Israel, showing they will not be completely annihilated, while his apostleship is to Gentiles (Romans 11:13).