Answer to your initial question: Since the political party in Eretz Yisrael that is the de facto party of the Modern Orthodox/Religious Zionists has made destruction of the Israeli Hareidi community into a primary goal. In the past they were more concerned with the Dati Leumi Torah institutions (such as hesder yeshivos) or support the settlements, but they sacrifice that to concentrate on trying to banish the hareidi instituitons.
Your question would be like an American asking the Japanese why we can’t get along on Dec 8 1941.