Link to episode, relevant bit is near the beginning.
To summarize: In America, any Nazi asshole with even the slightest murderous intent can get a gun pretty easily and then use it to kill a bunch of civilians in a mass shooting.
This is in contrast to Japan, a place with very strict gun control, where it's far more difficult for said Nazis with murderous intent to get their hands on a firearm to act out their fantasy. So what happens is those Nazis, even if they kinda want to kill, are still too lazy to go through the arduous process of getting a gun to do so and are more likely to just stick to the far easier option of posting on 4Chan.
So those people in Japan who do want to get a gun bad enough aren't going to "waste" it on a bunch of no-name grocery shoppers or whatever, they want all their effort to be "worth it", so instead they do targeted attacks on high-profile individuals, most likely politicians, like Abe.
So that's why in America we get plenty of mass shootings, but very few political assassinations anymore.
Yes I agree but I feel quite strongly that the combination of factors within American lifestyle and society itself is generating these mass shooters and that regulation will only reduce the scale of the horror while not actually stopping the problem of people being driven to perform these murder-suicides.
I think if you could delete all guns tomorrow from the face of america the same number of murder-suicides would occur. It would change shape but the problem of people killing themselves and taking others with them when they do it would remain.
If all the guns disappeared from American soil, after the first U-Haul van/truck is used to mow down protesters the gun control liberals will be agitating for seven day waiting periods to rent trucks