It's hard to explain to someone who can only hold one sentence in working memory that the holocaust was bad because it was a genocide and that what Isreal is doing is bad because it's a genocide. It's like a fixed number of words, letters, or syllables. They fixate on presumption and emotion because they cannot engage with intellectual debate. I'm strawman-ing a bit, but I don't know how we prevent people like this sinking the entire ship.