Liberals/progressives/leftists are disinclined to endure the discipline required to be in the military and they certainly do not believe in putting their own bodies on the line for anything with . . . consequences attached to them.
They far prefer SAFE civil unrest, but only if they know going in that mom's and dad's lawyer can pull stings before a 'friendly' judge and get them off with maybe a few hours of community service after the fact. Otherwise they are not going to risk it.