In fairness to Alec Baldwin and other actors, the modern school of method acting means that they must cultivate their emotions and put them on hair trigger in order to give convincing performances. This is subversive to the discipline and restraint that are essential to being a thoughtful and responsible adult.
Does Alec Baldwin have PTSD? Who knows, but we do know that because he is an actor, he is an emotional, undisciplined dolt --which is what we pay him to be.