A fun argument I just made up: liberal folks should encourage diversity of opinion even when it leads to hate crime, for the same reasons that they encourage ra

A fun argument I just made up: liberal folks should encourage diversity of opinion even when it leads to hate crime, for the same reasons that they encourage racial diversity which demonstrably leads to more crime. Otherwise they'd just be using a double standard to attack their ideological opponents. I wonder if this line of reasoning can be quickly refuted or it contains something deeply true.