Democrats/Leftists get away with this thinking — this type of behavior — because they know no one will stop them ... not just because “good intentions” based on emotion cannot be countered effectively, if at all, by reason and logic, but because — and Democrats/Leftists damn-well know this — so very many on the Right fear the Left even more than they fear God (which, from a practical perspective, is not without good reason.)
This is what happens to “public property” in a society without character and virtue.
If we want nice things like decent public places, we will have to _earn_ them.