That being said I have a problem with your comment. You are talking about that the rocket exploded as if it was of consequence. You even capitalise it. Why do you think it matters?
Safety of a test is about the process, not the outcome. You might have a bonkers unsafe test and come out lucky. That doesn't mean that the test was a good idea or safe.
Or you might have the worst of luck, a complete explosive failure, and still everyone remains safe because the processes were right.
I don't know if the FAA is right or wrong. I don't know if the processes of SpaceX were safe or unsafe, but I know one thing. From the fact that it "EXPLODED" but hasn't hurt anyone or caused any 3rd party property damage you can't draw any conclusions about the safety.