I'm an open Zionist (although not the rabid Netanyahu-loving kind). I'm willing to accept downvotes for defending that position, but at least as a German who is currently an academic student and not associated with an employer I don't have to fear social repercussions for it as well (and notably, I write under my actual name).
Other people, particularly in the US, but also Spain or Ireland where the culture/social sphere is widespread anti-Zionist, might choose to not do so for the reasons I mentioned.
It's a bit rich pretending like Zionists are somehow to fear for their jobs etc. given getting pro-Palestinian professors etc. fired was the Zionist modus operandi for decades. Germany really hasn't changed much, has it?
Other people, particularly in the US, but also Spain or Ireland where the culture/social sphere is widespread anti-Zionist, might choose to not do so for the reasons I mentioned.