That is an "argument" altogether different than what one is "allowed," pursuant to the Bill of Rights, to do. I think "being rude bullies" may likely have negative effects, and for that reason, I would not, personally, take part in such a protest of that kind.
But what I choose to do is not what everyone chooses; and I would not force MY OWN "politeness" on others, just as I would not have others force theirs onto me.
No one is “forcing” anything on anyone here. Stating one’s opinion that another’s conduct-—in this case, in protesting-—is not helpful, is just that: an opinion offered for the sake of influencing behavior.
If, as you do, you believe that such tactics (”being rude bullies”) are not helpful to the cause of life, why don’t you speak up against them? And why are you arguing with people who are willing to speak up agains them?