Why do democrats and republicans disagree and seem to hate each other so much?

Because Democrats have more compassion & understanding and actually base things off logic, not faith. Republicans do not know how to be compassionate and do not care about the underdog. They could care less about the planet, which is something Democrats care about as well. Republicans want to destroy this country by raising taxes for the poor and cutting them for the rich. They want to limit options for women, abortion control is more important than larger issues. They don't care about this nation. Democrats want a nation united where everyone has a chance, rebuplicans want a nation divided where if you're not a big businessman you should give up. Democrats want to instill family values, Republicans only care about money and success.