Under a conservative government, liberals can still usually act in a liberal fashion. They can give half their money to public services and charity, they can treat gays and women like equals all they want, they can even free all their slaves.
Under a liberal government, conservatives aren't allowed to keep all their money to do with as they please, they can't treat gays and women like inferior people, and they're not even allowed to keep slaves.
I'm not ragging on all liberals here -- I've met a few who aren't hypocritical morons. But when liberals feel their ideals have to be taken and forced upon people who don't believe in them, that's where I draw the line.