“What if this killer is actually a muslim terrorist carrying out the orders of his imam?”
In terms of security re jihaddis, you have asked exactly the right question!
This kid might or might not have been a moozie convert. Never mind that, unless it is shown that he was.
Instead focus on how easily he did this. Also focus on the meticulous attention being given to details of why this why not that in his movements and lack of any apparent competency in security before or during the acts.
Now imagine a dozen or two moozie cells in the US (many of whom are currently students at Universities that they know intimately) watching all of this, making notes, etc.
Finally, imagine a dozen or more pairs of jihaddis replicating this either singly or in pairs or very small groups on campuses they already know well......perhaps on September 11....or even Apr 19
That is exactly why the terror angle has to be looked at.