Whether any Rav supported the medinah between 1948 and 2013 is irrelevant now, since an agreement to exempt yeshiva students from the military was in effect then, and it no longer is. An analogy would be to quote someone discussing how we view Germans from the second reich (1870-1918) and saying that was how the person felt during the third reich (1933-1945) when the policies changed.
Conscripting yeshiva students is a “game changer.” Not funding yeshivos, or structuring welfare benefits so as to injure the hareidi community is mere politics since no one argues that a non-Jewish government has any obligation to give moeny to yeshivos or to give money to frum people and causes. Drafting yeshiva students and ordering them to stop learning Torah is very serious. Even if Dina Malchus Dina applied to the government of Eretz Yisrael, it would apply to such a decree.
There’s even a gemara in Sanhedrin suggesting that if the military police come to arrest yeshiva students, they are allowed to to kill the police (i.e. that the Lapid-Bennett program means the zionists have a din of a rodef – and everything they’ve been arguing to support schechting Arabs as pikuach nefesh, now applies to the zionists — which, BTW, is a more radical position than even Neturei Karta has advocated).