The "Odin" tattoo implies he is a white supremacist / separatist. That hand symbol on his chest could be a gang sign, or
The news is all but ignoring the other shooting victims, to focus almost exclusively on the Park Ranger. That is oddly manipulative and disturbing, and draws the Mt Rainer event significantly out of context.
The old park weapons ban would have done NOTHING to prevent this tragedy from occurring. Weapons are banned in schools, and yet criminals still bring them into schools and shoot people.
At least under current park rules, ordinary park customers can have the means to defend themselves -- if they so choose. Anti-gunners will try to use this incident to their own twisted ends, but I believe such attempts will fail miserable.