This is demonstrably not true. Look at new york. They bring in broken window policing and do it passably well and things turn around in a decade. They then stop

This is demonstrably not true. Look at new york. They bring in broken window policing and do it passably well and things turn around in a decade. They then stop enforcing the law and move to a more laid back, defund the police style and things turn back towards trending to crap again. The other stuff you mentioned matters but the biggest thing is effective policing of all crime.