MDG:
Seriously? Are you really even questioning that the MO faith requires Zionism and how important it is to them?
RYBS himself was the head of Mizrachi, “Religious Zionism” and was upset (as per his writings) when, at some point, some doubted his allegiance to their views.
Regarding RHS’s view on Nationalism and pikuach nefesh, please see this post:
(As well:
The fanatic obsession in MO institutions with Zionism, Zionist holidays like Yom HaAtzamos, et al. and much more, also makes it quite clear that Zionism is a very big part of the MO faith.
Do you not know what goes on in MO schools?)
I hope that satisfies your question.