Who lets them? The Republican courts you mean?
The majority of buildings destroyed is not the majority of lives lost. More people were killed faster under Trump. Somebody is lying to you if they're telling you Democrats were easier on Netanyahu than Trump is. They are lying to you because they want you to hurt yourself.
Observe the acceleration under Trump
https://www.statista.com/statistics/1616501/monthly-gaza-fatalities-injuries/
https://infosec.pub/comment/23470753 - here's a whole list of how Trump was worse in every way exactly as the warnings said
The recent slowdown in Gaza is caused only by increased killing in Iran and Lebanon, which does not play in your favor