Well He said to turn the other cheek and then caused a shit storm in the Temple. If you have to suck, and suck, and suck to get life lessons from the Bible, you don't have a great deal of intellectual capacity. As far as what Jesus had to say about slavery, we really don't know His opinion. If He said something about it, it never made it to the Bible. But, one has to keep in mind as well, that the material world was not the primary concern of Jesus. For Jesus, it was not where you were in life that was important so much as what you make out of life that was important. His message was primarily internal; that being focused on one's inner self and personal interactions as opposed to major social revolution. There are a lot of reasons for this but that would be a thread unto itself.
As far as your "modern morality" and statement of superiority is concerned, you are certainly portraying yourself as an elitist. I ask you this: "what is moral?" Doesn't morality depend on the environment around you? I would argue that what is moral is based almost exclusively on geography, time, culture, etc. For you to say that your definition of morality is superior is quite ethnocentric. That's the kind of stuff extremists say.
In Luke Jesus helps us understand Gawd's relationship with humans by telling us that Gawd treats people the way people treat their slaves...they beat some more than others. Then Jesus gets really crazy and condemns a fig tree, simple because the fig tree stopped producing figs. Yet, here you are, blaming me for not being able to suck enough meaning out of the Bible.
To date, I haven't run out and murdered any of the people I dislike because I feel that living in such a vigilante society would be a step back in societal evolution, and thus less good a life for me and for everyone else. The old "Wild West" of America was such a lawless, vigilante society, even though its denizens were steeped in religiosity. Everybody "open carried", and a careless word taken as an affront could cause a shootout in the public streets, resulting in death. Common in those days, even though nearly all of those Western gunslingers were Christian born and raised. I think society has come a long way since then, for the better. And it's due to secular law and personal ethics, not religion. Obviously.
I'm sorry you feel that I'm an elitist simply because our ethics and morality have evolved.