This is true, however there are people who don’t like Israel and blame all Jews for what Israel does.
I’m an American Jew. I don’t like much of what Israel does. Guess what, though. I can’t change Israel’s actions. I can speak up, but I have the same say as any other American. It’s not like Israel is going to say “this random American Jew said to stop so we’ve got to stop doing this.”
Unfortunately, there are people who seem to think that all Jews are valid targets for anti-Israel sentiment. I’ve seen people spray painting/vandalizing buildings because they are Jewish temples, businesses, or homes. I’ve seen people online justify this by claiming that every Jew is a representation of Israel and thus a valid target. I’ve seen people cheering on Hamas’ attack and slaughter of innocents and hoping that more Jews get killed worldwide.
And before anyone comments: No, I don’t think Israel killing innocent Palestinians is good. That’s one of those things I’d change, but have no power to really affect. I could speak up more with the Palestinian Rights folks, but if people in that crowd are calling for Jews to be killed, do you really think I’m comfortable joining that crowd?
So you can criticize Israel and be fine, but if your “criticism of Israel” is “all Jews need to be held responsible for what Israel has done and should be killed,” then you’re definitely anti-semitic. (I’m using the generic “you” here.)