You are putting the responsibility for those murders entirely on Hamas rather than the government currently perpetrating them, thus justifying that government’s actions. You could have just as easily made your opening comment, “Man, if only Israel cared about international law.” Please stop insulting my intelligence.
I suspect it has to do with being a sort of household appliance. Similar to the fridge, the TV, the bathtub, etc. People think about it in that sense most frequently and it becomes the common parlance.