"He who fights with monsters should look to it that he himself does not become a monster. When you gaze long into the abyss, the abyss also gazes into you ..." - Friedrich Nietzsche
While it is understandable to feel moral outrage and a powerful emotional response to the plight and oppression of the elves, retaliation such as you're suggesting would make you far worse than the humans in this story. Remember that there are good humans as well, ordinary people with ordinary lives, and they'd be caught up in the indiscriminate massacre that you propose.
Seek to right wrongs and injustices, not create far more of them.
P.S. Keep in mind that you didn't have a problem reaping the benefits of elf/human relations early on. Lin was your slave from the start, and your first thought wasn't "I must free her at all costs!" You went into it with the mindset of "oooh, kinky harem simulator!" Your default state wasn't that of a moral crusader, but an average person. Suppose someone came along during that point in the story with your current mindset. Saw that you were a slave owner and instantly declared you to be irredeemably evil. They then sought to end your life or at the very least ruin it. You probably wouldn't have appreciated it very much.
I'm not saying that you shouldn't have a reaction to the story at all. Instead, temper it with some self-reflection and humility.