Like, if you know for sure that the folks attacking the protestors are Jewish supporters of Israel (which many probably are), then it's fine to call them "Zionist Jews".
And if they are Evangelicals who support Israel but only so all of the Jews can be killed in the Apocalypse, you can call them "Christian Zionists".
If they're nazis, say that.
But as an older, anti-zionist Jew, I still hear "zionists" coming from non-Jews as a thinly-veiled slur.
trochee
inquiline
oblomov
toolbear