I don't know why you brought the idea of 'minorities' into the discussion. But, even if you take away the 'minorities', Switzerland still has less shootings and murder.
America has always been different.
Because it is estimated that approximately 90% of all violent crime in America is perpetrated by nonwhites.
Just think if suddenly the violent crime rate dropped by 90%.
It would almost be a utopia. My kids would be able to play in my front yard.