US ruling class are Zionists. They are all part of the same club. Doesn’t matter if it is not in the interest of the US state, only that it benefits their own interests.
The Christian right are selective, fatalistic "Zionists" with magical thinking beliefs that, in their view, lasts until the apocalypse because they believe some Jews will convert and others will meet a bad end. Since they don't really care about Jews except as a means to end everything and meet Jesus, does that count as "Zionism"?
Rich, authoritarian criminals. Which is a bit redundant because "rich" suffices. Netanyahu and Trump are both in roughly similar predicaments compared to extreme examples like Putin and Kim Jong Un. They've done things to anger ordinary people but refuse to concede power for fear of prosecution or worse, and so do everything to insulate and extend their rules.
Yes. More specifically: Christian Zionism [https://en.wikipedia.org/wiki/Christian_Zionism].