I doubt Cruz was anything more than just a killer that they’ve been watching. My theory on the flase flags is they just let it happen.
Not only that, but they then seed cyberspace with people to put forth theories of “crisis actors” and actual hands on involvement in the event which subsequently muddies the water horribly in the ensuing debate/discussion.
Look to 9-11 as the classic case. Alphabet agencies had loads of heads up that something was going down and did nothing, and the ensuing noise from all the “truther” bullshit completely drowned that out to a footnote.
It does appear that this event is so glaringly obvious that the media and brat pack anti gun yapping isn’t going to gain their expected traction.