Having said that, I would be willing to support some tightening of firearms ownership and carry regulations, IF they were reasonable, not blatantly unconstitutional (like the watch list thing), and seemed reasonably likely to actually be effective in reducing the incidence of gun violence. Most of the restrictions that get proposed, though, don't meet those criteria as far as I can tell. For example, making college campuses "gun-free zones"--that doesn't do anything to stop the person who specifically came there to shoot it up. If you think that banning semi automatics or easily changeable magazines is going to make a difference, you haven't seen cowboy action shooters work their manual repeaters with fixed magazines.
I think we'd be better off trying to discover and counteract the toxic memes that are driving people to become violent. That's much, much harder than just banning the possession of certain objects, but it would address the problem, not just a symptom.