Uh... hating Jews? If it was resistance, it'd have been subjected to something resembling a cost-benefit analysis, and the conclusion would've been "this won't help us at all and will actually probably hurt us let's not do it." These people aren't dumb; they can do and have done things that actually hurt Israel (the Intifadas come to mind here), so any amount of thought would've led them to the obvious conclusion that bombing school children isn't likely to be one of those things (and also, you know, that bombing school children is bad and they shouldn't do it). Now to be clear, I'm not saying these attacks aren't resistance because they target civilians (counterexample to that heuristic), but that they're not resistance because if they were they'd pointless and be really fucking dumb. Again these people aren't dumb, so up to a margin of error they must be antisemitic instead.