> These aren't coherent organisations, just loose collections of aligned folks.
Yeah, there aren't any coherent organisations that claim to be Zionist. There's no state in the Middle East born from this ideology. There aren't political organisations that bribe US politicians to influence US government. There aren't organisations that hose real estate meetings in Synagogues to sell illegal lands for people to make Aliyah.
Definitely just a loose collection of aligned folks. Yep.
> there aren't any coherent organisations that claim to be Zionist
That you have to put up straw men sort of proves my point.
Yes, there are coherent Zionist organisations (including political parties and lobbying groups). Some (perhaps many, hell, maybe even most) of these are fascist and ethno-religious supremacist. We can make meaningful statements about them because, as you said, they're "coherent organisations that claim to be Zionist".
Trying to expand that to "Zionists" in general isn't meaningful unless you're constructing a totem to pillory.