The calculus changes when everything from ambulances to children could be actual, literal bombs.

That’s a really weird way to say, “I’ll kill any Palestinian that moves, even the cattle, because I can’t even bother viewing them as human beings”.

Would it be acceptable if someone shot an Israeli ambulance, saying, “well, you never know these days, these ambulances are full of IDF ready to attack!”?

Nope, and neither should the opposite.