Ban politicians. At least ban the ones with stupid mindsets, like that NY congressman Steve Israel. He really thinks criminals and terrorists will go through the trouble of 3D printing, when they can easily buy guns on the black market? Oh, it's about plastic guns. Well, some terrorists caused some major mayhem with some box cutters, yet they haven't banned the manufacture, sale, or possession of those box cutters.
As you say, ban all terrorists. But the lawmakers, enforcers, and jailers seem hell-bent on ignoring them and going after law-abiding citizens instead. Stupid politicians.
No he doesn't; he isn't actually that stupid. This is a ban designed to restrict freedom for LAW ABIDING citizens. You know, you and me the ones they want to make sure are unable to resist tyranny. Criminals aren't any threat to the government (you don't see crooks stealing guns from police stations - just corrupt cops), and terrorists are a blessing to the government because they provide a convenient excuse to remove freedom.