Why was he still in the uniform? He sure sounds to have been disloyal at best, and a danger at worse. Somebody dropped the ball. Kind of reminds one of the stories when school shootings started getting big - reports start oozing out of the woodwork that the person had made threats, shown signs of trouble that were ignored or even swept under the rug.
Still far too many don’t want to admit - we are at war with Islam, but are taking it even less seriously than the failed “war on drugs”. In our efforts to be the most tolerant nation in the world in regards to religion, we have turned a blind eye to the hate that is The Quran, and even more so - that is the far-too-common teachings of the Imams.
All of the PC bs is a part of the long term and continuing strategy of the Left to change this country to a totalitarian state. It silences opposition and breeds discontent. The Muslims and the Left work together toward the same end. (See David Horowitz's Unholy Alliance for details)
The answer to that is obvious. "Political Correctness" reigns in the military just as it does in every other government agency. The only difference is, in the military it becomes deadlier more quickly.