I think Hamas has somewhat lost the propaganda war on this, at least in the west. Maybe it is a "cultural" thing of which they like to see in that side of the world or just brainless... but filming and propagating your group capturing/killing/parading dead "young attractive" females and random frighten innocent looking people is pretty dumb. War and death is horrible obviously, but these types of videos is stuff you try to censor out your side committing. Israel shows themselves blowing up a residential tower but they hide the fact that many innocent may have died.
You shouldn't be surprised at the content Hamas are putting out, in a region engulfed by conflict continuously, the people are extremely desensitised to such content and so what they consider normal could be repulsive to us. They are not looking for our support, but the support of other Arab nations.
We're simply judging them by western lenses while in reality it's not any different than the stuff that any other middle eastern military puts out.
In regards to the Israeli destruction of the residential tower, they did perform knocking before hand via low yield explosive on the roof top a few minutes before the actual strike.