G-d: "I want Israel in the Land - even if they defile it!"

Here's a question that repeatedly arises: Given that we see some Jewish communities that by and large traditionally observed the Torah and its commandments, yet ceased doing so to a significant extent after they immigrated to the Land of Israel – was it worth it? There were great rabbis who said, prior to the Holocaust, that religious Jews should not ascend to the Land as long as its Zionist leaders were sinners and sometimes even heretics; perhaps they were right?