He was also quite likely former military (demeanor, posture, verbiage), and in a jurisdiction that respects the Constitutionally protected right to defend yourself.
Contrast those facts with other situations.
America needs to understand that our troops are not 'disposable'. Each represents a family; Fathers, Mothers, Sons, Daughters, Cousins, Uncles, Aunts... Our Citizens are our most valuable treasure; we waste far too many.