This is just activist cope. Voters in Illinois CD7, where I live, didn't put Melissa Conyears-Ervin (lavishly supported by AIPAC) into a tight second-place run against La Shawn Ford because Israel bamboozled them. If you look at the map of where the MCE votes came from, it's very unlikely any of them gave a shit about Israel whatsoever. Her votes followed the exact same pattern as they did in 2024, when she gave Danny Davis (the long-term incumbent) a run for his money, and when she wasn't supported by AIPAC at all.

In the Illinois 9th, AIPAC supported candidate seemingly at random in an attempt to split the progressive vote and clear a path for Laura Fine. Didn't work there either.

It may very well be the case that Israel is disfavored by a strong majority of Illinois Democrats (I'd certainly understand why). What your analysis misses is salience: people care about lots of things they don't vote about. Poll primary voters here; you will find a small group of them that think Israel is the most important issue in the district (they will be almost uniformly white PMC voters and they'll be disproportionately online). Mostly you're going to find voters that (a) hate Trump and (b) are concerned about the economy.

It's clearly not the case that "anti-genocide candidates" enjoy a 90% share of the Illinois Democratic primary electorate, because they didn't win.