"The same compassion for those seen as weak creates political correctness[11], which constrains discourse and is complacent to the extremely sensitive PC-authoritarians that use violence and shaming to advance their cause."
So it's not that "leftists are violent", it's PC that's complacent to violent PC-authoritarians that use violence and shaming. A bit different.
Again, I have the impression that parts of this debate could be avoided by accepting some of the caveats and distinctions already made in the memo.
Edit: replaced angry outburst with more civilized one.