While you claim there are correlations, there is a massive difference in trajectory. Christianity has a very long and documented history of driving the movement against slavery. The abolitionist movements were rooted deeply in Christian theology and the belief that all people are created in the image of God. There are Christian abolitionist movements from the age of the Byzantine empire. In contrast, we see an ideology in Islam that not only permitted slavery but based it's economy on slavery for 1200 years, and has seen it reintroduced in various forms in modern times. As a general rule, the more religious the movement, the more it is pro-slavery. And ... where do you see any islamic movements for removing slavery out of the religion as we have seen for 1500+ years in Christianity? You know, where do you see these muslims countering the "extremist" pro-slavery camp in islam?

I wear glasses, so perhaps that's the reason I have so much trouble finding them?

(btw: yes, I know that such movements exist, like the Ahmadiyya sect. The majority sect of muslims is attempting to eliminate them, which is even worse, imho, than them not existing at all)

And given the values of liberty and human rights that Americans have, I would expect people to have a significant problem with any ideology that continues to leave the door open for slavery.