I think so much of the anger towards Baldwin had to do with his political affiliations. I also remember glee from the left when VP Cheney peppered his friend on a bird hunt.
You have to admit that somebody who actively wants gun rights restricted, but then makes themselves rich by PRETENDING to use guns, then does something hare-brained like pointing an "unloaded" gun at a group of people and pulling the trigger while not even filming is kinda ironic/karmic. EVERYBODY gets taught "don't ever point a gun at somebody.... even if it's unloaded." Also, there is a substantial difference between a misfire/accidental discharge like in the hunter's case and pointing a gun at somebody and pulling the trigger. Or at least that's my understanding of what happened.
But I agree... reactions are 100% political and hypocritical.