“called Zionism the Avoda Zara/apikorsus that it is. “
And yet they respected Zionists such as Rav Reines, Rav Kook, Rav Herzog, and Rav Soloveitchik. They would not have done so had they thought that they were apicursim.
“There are no other valid shitos in this regard”
I just proved you wrong on that one.