Not supporting Palestinians (you know, the civilians, including children) tends to bring out those accusations.

The way you formulated it, however, indicates that you think that Hamas = Palestinians or at least that it's fine if Palestinians suffer for the actions of Hamas, something only a racist would think, so in your case the "accusations" are associated to you being percieved as a racist.

Maybe the one thing the entirety of the Left agrees on is that Racists are scum, not least because racism is one the main defining features of the oldest most murderous kind of rightwing extremism there is: Fascism.