"I always was under the impression that Antisemitism is when someone is against Jews because they’re Jews, basically like racism but against specifically Jews. But lately I see the word Antisemitism used very lightly ". What else was that supposed to mean?

But lately I see the word Antisemitism used very lightly basically if someone is dissatisfied with the actions of the state Israel then they are called Antisemitic.

Not OP but: I mean if you bothered to read the sentence you quoted to the end you'd have your question answered