Except that's a tiny minority of people who are using the term right now. I would say that the majority of the non-Jews (because there have always been Jewish antizionists!) describing themselves that way are using it in a way analogous to "antiapartheid".

(Please note that anyone replying to this to explain why Israel isn't really engaging in apartheid has missed the point of my usage and I'm not going to be nice about it.)

Oh absolutely, but that doesn't help with the initial reflex.