antisemtexism

Sounds like you're the one with the problem then. He barely said anything offensive, just misspoke - if you look at the full blog post text, the intent is clear.

Well, I've seen the opposite. I suspect it's not leftists you're witnessing saying such things.

Criticism of Israel's apartheid policies isn't antisemitism. It's such nonsense how the two have been conflated in recent years.