EOM:
Our gedolim have written that the point of Zionism is shmad, and therefore the Zionists need a State, not the other way around. And that Zionism is Avoda Zara and Religion mixed with Zionism is merely Religion and A”Z biShituf.
Zionists wanted Zionism to, CH”V, replace Judaism as the religion of the Jews.
It is clear to anyone who observes what goes on there that this still holds true today, even if the Zionists’ methods have changed since Yaldei Teheran, et al. But this is besides the point.
Once you understand what Zionism is, it is clear that pro-Zionist means pro-Shmad even if the pro-shmad part is unintentional.
The Zionist “favors” are to either further trick people into believing in Zionism as, CH”V, the new Jewish religion and/or to buy influence and votes. (Of course, the “religious parties” in their parliament do work for the welfare of their constituents). Pirkei Avos basically says as much; this is not a chiddush.
As mentioned, the “Chareidim” lived in Eretz Yisrael before the Zionists came along and started up with the Arabs against the expressed wishes of Rav Yosef Chaim Sonnenfeld and the existing Chareidi population.
As for Hakaras haTov, I’ve previously posted the example of an arsonist who sets fire to a massive building complex and, while the fire rages, then goes to get his firetruck.
Once you’ve clarified what, if any, hakaras haTov, is due this arsonist, then you can determine the same for Zionism.