What personality trait in someone make you immediately eliminate any chance of a future friendship?

right wing extremist fundamentalist evangelical republican sociopath trump supporter.

Racism, bigotry and gossip.
I'd be friends with an Ultra Left Wing Liberal before I'd becomes friends with any of these types of people. At least I can have a conversation with the Liberal.

lies.. cruelty. into drugs or alcoholism. racism. prostitution. immaturity. pedophile. if they sexually harass people. like they cant control themselves.

the "know it all" kinda ppl..i hate ppl who are oversmart n think that others are just pieces of shit

Those who think they are oh so very holy and have the right to look down upon others.

Closemindednesd

Complete Indifference.

am more into inner persona and it suits me well to be able to appreciate the rarities, if seen and felt, but from a distance.

Someone that expects everything around them to go their way.

I choose my cohorts carefully

Stupidity .. I hate stupid people

Arrogance and cruelty

Willful ignorance.

Ego, lies & gossiping.

If they like robots.

Condesention

treachery

Arrogance.

Racism

Discrimination and obvious sinful lifestyles.

Well you never know, they can change. But for that moment.