I'm sure auths justify it just the way you're doing it.
I'm sure every authoritarian/genocidal govt in history has justified their heinous act with the same logic too. "It's for the common good/good of x people."
Protesting is the fundamental right of a human being. the 'cause' of protesting is irrelevant. You could stage a protest to have access to everyone's mothers at all time if you'd like, that too would be your right.
Blocking phone internet seems to an efdective solution to this for now.