Regarding today’s Navy Yard massacre, we currently know this about the killer:
1) He’s black (thus probably negating Tea Party affiliation)
2) He’s a Buddhist (thus probably negating a religious motivation)
3) He’s a New Yorker (thus negating the likelihood of emotional stability)
4) He had a history of legal dubiousness
5) The Navy Yard was yet another “Gun Free Zone”
As for motive: so far… who the hell knows?
What’s reported: he had a shotgun, an AR-15, and variously a Glock handgun and/or a “rifle.”
I’ve seen reports that he actually showed up only with the shotgun. Reportedly he took out two guards and then up-gunned with their Glock and AR-15. If true, this means that the AR-15 in question was actually a government issued weapon, and not something controlled by local, state or federal gun control laws. And if true, expect that little detail to be ignored in favor of talking heads on TV yammering about “yet another evil AR-15.”
And the only people armed at the facility were the guards, who he took out first via shotgun. Again, speculation based on muddled reports. This would have left, once again, a large number of defenseless citizens at the mercy of an armed maniac… in this case, armed by the government.