Gun owners, why start a mass shooting, knowing we have a democratic president looking for any excuse to ban all firearms?

I'm no republican or NRA lobbyist, but even I think it would be a bad time to give these politicians a reason to outlaw guns. Considering how many mass shootings have been on the news with the attacker never really getting what he wanted, why would anyone want to attempt another one? Are they trying to break a record? Even if you hate Jews, what are you hoping to accomplish by blowing up a synagogue as if it's the only one? So you kill a bunch of of them only to spend the rest of your life in prison, while the surviving Jews get to roam free from your wrath. Why throw your freedom away committing such a meaningless crime? Do they not dream big enough? 

Instead of shooting up a massage parlor, you could become president and nuke China. Why doesn't anyone think like that? At this point, can anyone really blame liberals for the stupidity of gun owners? Conservatives, if firearms do become illegal it will be your fault for ignoring this problem for so long. If all gunmen are just mentally insane why aren't they sent to an asylum rather than a prison?