Perhaps even further to the point, the post buddy was replying to was a critique of Labour Party policy that had literally NOTHING to do with Israel at all. So the implication was that Starmer is rounding up migrants, denying care to trans kids, and expelling Labour MPs voting to end child poverty because "the Jews/Israel made him to it."
There's a lot of things you can criticize Israel for, and you can read about them on my timeline, but none of them are "Keir Starmer is a hateful Tory."