There's the problem right there.
And why should it BE a problem.
Fault Singapore’s fanaticism all you want, such a rider wouldn’t be touched. Someone attacking him would be very likely to get brutally caned if not worse. While I don’t advocate that degree of vengeance in America (they recruit troops to carry this out based on how heartless they say they can be), I do think that the US could come quite near to that level of public safety if honest people could bear any reasonable kind of defense arms without hassle.