Conservative brains typically have larger amygdalas, which are responsible for anger and fear responses. So yes, their brains reward them when they get angry, so they seek more occasions to get angry.

They seem contrarian because half their ideas are outdated by centuries and against the modern commom sense.

Sounds a bit circle-jerky, but anarchists and socialists are just arguing "We could fix racism and homelessnes easier my way." meanwhile conservatives in the back are going "Prove racism exists! Also high homelessnes rates are actually a good thing because..."