It could also be a lot worse. Ever heard of Hiroshima - or about the carpet firebombing of Dresden?
“it’s bad but worse war crimes have happened in world history so it’s fine actually” is such an incredibly bad and disgusting argument to make for killing hundreds of people–many of which are children–a day who, again, have done nothing but be born in a place that a terrorist group operates and from which they cannot leave because Israel (and to a lesser extent Egypt) will not let them. any further attempt to justify the course of action Israel is taking on these grounds will get you banned from this instance.