What baffles you most about human behavior?

The level of evilness which human can do which can be unimaginable.

George W. Bush (dumb as a stump) and Donald Trump (batshit crazy).

It makes sense to me. Ego constructs, emotional responses, reactions to stimuli, established neural paths. There is much debate as to whether self-interest or cooperation should be held as most conducive to the nature of being. Both or something else entirely. All things notwithstanding, doubt quavers at the heart.

Very little. Not saying I know everything, but pretty much 99% of all human behaviors are within the "understandable" realm, to me. Not that I understand why they do them, but they do not baffle me. Or, maybe I just don't have anything off the top of my head.

the level of ar-sel-
icking and hypocrisy
that goes on

The way they manipulate and tell lies for their own personal gain

Humans:The cruelest animal