A few reasons.
A pointless, endless war that nobody even can recall the point of.
Thousands upon thousands of Americans and Iraqi dead.
Demonization of every thinking American.
Two major American cities allowed to be critically wounded, one nearly destroyed.
Helping the rich and throwing the poor and middle class to the wolves.
Ignoring impending environmental destruction.
Punishing every blue state.
Unbelievable corruption of an unprecedented scale.
Destroying American's reputation and causing nothing but pain to our allies, and provoking every enemy to no conceivable purpose.
Not lifting a finger to help Americans but rushing to the aid of a dead woman.
Intense arrogance as though their hold on power was God-given and permanent.
There are many more. And not a single reason why not. Wouldn't even two or three of those be enough?
Republicans: don't forget to drink yourselves to death this weekend.