I'd find it unlikely. Like Roger says, spec ops guys are not cut out for holding territory, and riot/crowd control/restoration of order duties are similar enough in kind that I wouldn't expect commando units to be made to do it. It's more of a National Guard thing, is my understanding.
Instead, I'd be looking at geography. I'm no expert on US climates, but Texas, Utah and "parts of California" are all hot, arid and with some rugged/mountainous terrain. Sound like
anywhere the US may have an interest in?
And of course, it's also entirely possible that a training exercise is just a training exercise. With the
relative wind down of troops from Iraq and Afghanistan, now would be a good time to see what lessons have been learned in the field, in a large scale operation. See if anyone has seen or come up with anything especially clever in the last few years. That this may also help in future operations in the middle east against ISIS is, of course, entirely coincidence.