Ultimately, though, as someone that is very familiar with guns, I have a hard time sympathizing with Baldwin. You brought real guns onto the set, and you pointed them at people. Primarily people that had no business having the guns pointed at them. It wasn't even another actor during filming, which I would have at least understood to some degree. It seems like the perfect storm of things had happened for him to "accidentally" kill this person he didn't like.
At the end of the day, any actors / set workers handling real firearms should have thorough training before using them. Trigger discipline, how to check the chamber, identifying cartridge types, emptying the chamber before setting it down, not aiming at people who aren't even actors...