I like how your comment is the perfect example of the behavior that you claim to oppose. You're cutting into the left while identifying yourself as left, and everything you wrote was destructive. Congratulations?
There are several reasonable positions that a person could take on this issue. You could point out the entertainment in increased calls for gun regulation. You could point out the consistency with saying that you're going to arm yourself as long as guns are legal, but also be in favor of increased gun regulation. You could point out that there are different factions within the Democratic party and on the left in general, and how people all have their own varying agendas. You could encourage a general strategy for Democrats and Democrat supporters to get along. But you did none of that, because you didn't care. And I don't mind if you care, but I want other people to see it, just in case they do.