yknow the more jk rowlings world falls apart in america (race relations, international history, population, etc) the more i like to think that america just straight up doesnt have the statute of secrecy. european countries are falling over themselves hiding magic but come to georgia and theres a drunk redneck wizard wingardium leviosa-ing the shit out of a tractor to the delight of his drunk redneck muggle buddies in a walmart parking lot.
wizard on muggle violence is prevented by virtue of there being like a 50/50 chance that muggle is packing heat. muggle on wizard violence is prevented by knowing that wizard can give you boils spelling LIL BITCH on your forehead if you try to start something.
america is the weird redheaded stepchild of the magic world.