Animals do not kill without a reason. When the Romans wanted to throw someone to the beasts (a punishment for religious crimes, and a particularly bad way to die), they had to starve the animals first. If you ever get thrown into a lion’s den (has happened to the best of us), you will probably survive if the manage to get out before the lion gets hungry. Mosquitos don’t bite unless they are hungry. Bees don’t sting unless threatened.
So the people who refer to Hamas (or the Nazis, or whomever is being annoying at the moment – we do encounter more than our share of such people), should stop insulting the “animals”.