> there aren't any coherent organisations that claim to be Zionist >> Where's the straw man?

Nobody argued "there aren't any coherent organisations that claim to be Zionist." That's literally how straw men work.

> makes these Zionist organisations all act in the same way

I haven't seen this level of coherence. But I also haven't seen anyone argue this properly. Instead it's always this "I have secret knowledge" nonsense.

> seems you don't know what Zionism is

Quite possibly. I've read the Wikipedia and have discussed it with Egyptian, Jordanian and Israeli acquaintances in America and Europe. I haven't seen anything to suggest it can be considered a philosophically, methodologically or politically unified movement in anything but its aim of establishing a Jewish nation-state, a goal which isn't inherently fascist or religious supremacist (but which is, again, inherently segregationist, though so is arguably an nation-building exercise).

Again, I think the analogy to folks who rail against Antifa as if it's a coherent ideology and organisation is apt. If you press any of those people for an explanation, you get similar 'you don't know what Antifa is' and 'you're probably Antifa' deflections. (Note: I'm not attacking you per se. I'm attacking the rhetoric. I'm engaging because I have a hint of a sense that you know something interesting that I'd like to learn.)