No, the passages are actually extremely blunt about slavery. Its a pretty unarguable fact. And it certainly wasnt christianity that ended slavery in america. It was people(some of whom called themselves christian) making a decision that something in their bible("gods" word if you will) was wrong and immoral.
I guess i'd take this stuff more seriously if people actually followed their belief to a T. The whole "pick and choose" mentality is really just humorous to me. But no one does and then the people who come the closest are usually the craziest(see phelps family/other religious extremists).