These are all points well taken, and my general approach of dipping into fever threads only when there's something concrete I think can be added to the thread does in this case seem to be contributing to veering. It's just memorable to me because I got my ass handed to me in a conversation with a friend about how credible the anti-Israel bias argument was. But I don't pretend this is dispositive of anything; my only claim is that there's a colorable argument here, it's not just some random made-up thing.
Thanks for checking me on this!