Which is precisely my point. They let you bring bags into their consulates, while checking the contents, unlike the U.S.  I doubt the workload has much to do with it: I'm sure neither workload compares with many U.S. courthouses (I suspect somebody who loses a court case is more likely to go berserk than somebody denied a visa), and they have no problem screening bags.

Some visa seekers apparently think they have the right to a US entry visa or some other benefit and when denied they go berserk.

Note that I have no problem with reasonable security checks. Assuming their presence, your scenario assumes someone hiding a weapon in their bag (with a good chance of being caught and denied a visa for this very reason; if that doesn't happen, maybe it should), so that they can then pull the weapon out and go berserk if denied the visa. I don't see this as very plausible.

I think the main difference between the Israeli and U.S. approaches to consulate security is that the Israelis actually want tourists to visit, whereas the U.S behaves as though they are a nuisance to be kept away at all costs. To judge by reactions I hear in Europe, they are quite successful.