One of the most important legitimate functions of government is the protection of natural rights from being violated by other governments or foreign individuals. The right of our use of force in self defense to protect and preserve our natural rights is a perfect right and therefore is moral.
Black males between the ages of 15 and 35 make up less than 2% of the population but commit almost 70% of all violent crimes.
Because of their rampant lawlessness, this tiny segment of the population is forcing decent people to think in racist terms.
Of course rational, law abiding citizens are going to arm themselves against this very real threat.