Do we want armed protests to become the standard? When the left feels particularly passionate about their side, and they do, are we OK with them bringing weapons?
Who the heck is "we?" Most of the "wes" around here that I know are perfectly fine with any American lawfully bearing arms no matter how stupid their political ideology is.
Which has absolutely nothing to do with the 2nd Amendment, because I'm not congress. Hence the straw man comment.