Trayvon Martin attacked a law-abiding, tax-paying citizen carrying a loaded Keltec.
Michael Brown attacked and even tried to strip a law enforcement officer of his weapon.
Ahmaud Arbery attacked a law-abiding, tax-paying citizen legally holding a loaded shotgun.
What do they all have in common?
Unbridled, stupid aggression.
They all would have been shot in the back had they not tried to "stand their ground". Simple as that.