Except if they're a leftist, liberal type, of course. Or even an adherent of a "preferred" or "protected" religion. These get to say racist, sexist, homophobic things all day long, and none of their fellow activists would bat an eye.
This is the person who led the movement to successfully deplatform Charles Max Wood, btw.
The Liberals are a _centrist_ party, not a leftist one. That's the NDP.