You’re undermining to pro-Palestine movement by calling everything and everyone who opposes Israel antisemitic.

The comment you wrote this to not only was not "calling everything and everyone who opposes Israel antisemitic" (it says your characterization of Jews might be), but it actually says "I despise the Apartheid colonialist political ideology that is zionism".

You are undermining the pro-Palestine movement by equating zionism with jewishness.