Dogs have natures and you don’t approach every breed in the same way. You don’t extend your hand to a strange pitbull on the street the way you might to some fluffy little thing who belongs to your gay buddy. We should use the same wisdom with peoples. Some dogs are natural born killers and so are some people.
When I’m driving and somebody on the road angers me, I check them out to make sure they’re not dangerous looking before I wave my hands in protest and honk.