Many ultra orthodox participated in the war of independence, Aguda signed the Declaration of Independence. The hostility between haredim and Zionists has not been constant, in the early days of Zionism the haredim were more supportive, before the founding of the State there was again a closing of ranks. And at present there is once again a closing of the ranks, as haredim are beginning to enter the army in larger numbers than before.
First refugees travelling on Hungarian bus arrive at Austrian border (Reuters)
from the article: Jerusalem Old City's Jewish Quarter almost entirely Haredi, study finds