Various figures cite tens of thousands bombs and munitions dropped, fired and launched on the Gaza Strip. The IAF is good, but it's inevitable there will be misses, mistakes and misjudgements. I guess that had it been an air force of lesser quality, there would be more of that.
What you believe is immaterial. There are more and more voices from the Gaza Strip (and the West Bank) berating and criticizing Hamas for bringing this calamity on their heads. I'm also pretty sure not everyone is thrilled to be 'sacrificed', surely not for leaders living in luxury at the Gulf. But again - I point out that there was (is) a way to protect civilians, if Hamas so wished. You do not accept it, fine.
When you start with 'butchers' etc., that's when I know there's no one home to talk to. You sounds like you need a little rest.