These three mass shootings happened in blue states (read the tag)

When you want to do a false flag, you go to where those in charge are sympathetic to your cause.

Criminal may be dumb but their not stupid. You go where the least resistance exists. You don't want to have some citizen with a gun end your day early.

Yep, that's the problem with gun control, most likely if you have a gun, chances are you had one for awhile