Gigantic tank-like vehicles with worse line of sight then actual tanks, insane levels of crime that are rampant all over the US compared to Japan, etc.
Make tank-like trucks and SUVs illegal to manufacturer is a good start. It's going to be tough to compete with homogenous first-world countries on culture and crime.
I don't want to blame it on diversity but the example provided in the article is a homogenous-culture society with high trust.