I think leftists tolerate bad behavior because they are failed people too. The thing leftists don’t tolerate is those who want people to improve their behavior.
This verse describes their behavior.
1Pe 4:3 - For we have spent enough of our past lifetime in doing the will of the Gentiles—when we walked in lewdness, lusts, drunkenness, revelries, drinking parties, and abominable idolatries.
1Pe 4:4 - In regard to these, they think it strange that you do not run with them in the same flood of dissipation, speaking evil of you.
Well thought and stated.