Most serial killers are white men.
I haven't commented much, because much of what has been said on here is just wild-ass speculation with no basis in fact.
As is my hunch. So, take it for what it's worth, which is nothing. There'd be some credit-taking by al-Qaeda by now, if it were an al-Qaeda operation.
Also, it wouldn't surprise if it were ex-military. Like law enforcement, the military attracts some real cowboys.
While it is likely this guy is a domestic nut since so far there's only been one gun involved...al Qaeda as a rule doesn't take credit for what they do- they're known for NOT taking credit. They have on occasion gotten bold enough to invent a nonexistant group and call in the name of the fake group, as they did with the US embassy bombings, but often they don't take credit at all, and certainly wouldn't take credit for anything BEFORE they're done.
If it is foreign I wouldn't say it was al Qaeda but more likely, some palestinian group, since they are known more for sniper-style shootings and small stuff.
Now Fox says a local RUMOR is that he's a native-American/hispanic guy.
That was an insulting thing to say about the military. Sounds like you have a real prejudice there. During the Clinton administration a lot of immigrants from Muslim countries were allowed to join the military to get their citizenship. I had a student from Senegal whose Senegalise father was Muslim and in the army. He was married to a black American woman and the marriage eventually broke up. I heard later that the guy was in some kind of trouble. Interesting that they lived in Woodbridge, VA. There are a lot of soldiers, unfortunately, from foreign countries that shouldn't be serving in our Army. Just don't be insulting the military as a whole. That is disgusting.
Al Quaida never "took credit". They got nailed sometimes, but they never bragged.
Learn what you're talking about.