Someone writing “F Zionists” very likely does not make a distinction between Zionists and Jews.
The Jewish Council of Australia is not going to name their hotspot “F Zionists”. Ultra Orthodox Jews are not going to use swear words to express their view.
I’ll go as far as say that anyone who genuinely wants Jews and Arabs to live in peace side by side is not going to go about it with antagonistic one-sided rhetoric.
Depends on who’s saying it. Often times it’s obvious from the context that “Zionist” is just being used as a loophole, and pretending that the difference is then still important is disingenuous.