No one needs a firearm in a National Park. There is not and should not be any hunting there. No one needs to protect themselves from bears in protected areas because people shouldn't go there and bother the protected animals, and if they do they do so with extreme caution and accept the risks. Asking for trouble is foolish, and, as usual, armed people only act more cocky because they have the weapon.
They should have put an amendment between the first and second specifying that common sense, civility and restraint was the standard of thinking at the time of the amendments.
Now, let the extremists swoop down on this totally reasonable comment.
Clearly you do not live in Alaska there4eyeM... Word of advice: Don't come up here, seriously, you'll die with that mentality. heh EVERYONE up here will tell you that if you leave the pavement you better bring a bear caliber gun, and like 75-80% are going to tell you to keep one around in the city just in case a feisty griz decides the dog on the other side of your window looks like an easier snack than the bear proof trash can contents... As you move north into polar country you'll get prob. 100%, see polar bears have the thing for human flesh, they'll actually hunt you heh
On the other hand, we don't typically kill a bear that mauls someone in a protecting their cubs situation, or even "meals on wheels" situations. We might move them out of the city, or to a different park, but in general we only shoot them if they develop dangerous habits like seeking out human's and stuff; which is pretty rare. (Except Polar's, we pretty much expect that kind of stuff from them so at most they just get moved away from the settlements; well at least by the US gov. anyway, the tribes in the bush pretty much do whatever they want about the situation - If I had to guess they likely kill and utilize blacks, griz, and polar's.)