I usually don't approve of ANY!! political protests designed to startle or shock people and the performers/speakers at public performances before, during, or afterwards.
However, liberals and leftists don't mind if it's one their protests doing the startling/shocking i.e. the kneeling before football games. Then it's different. "Everybody has a right to free speech (sniff, sniff, sob)" they wail. Like one of my lib stepdaughters who can't get it through her thick skull that there's a time and place for everything.
As Sneaky Pete said, libs/leftists are the biggest hypocrites.
