And here we go again with the attempt to make Islam somewhat right because Christianity did this or that.
Let's put this straight: Christianity did NOTHING. Europeans did. Europeans are extremely organized and when aim at some goal go for it in industrial scale.
Islam supports slavery, Christianity doesn't. However in only 3 centuries Europeans got way more slaves than the Muslims in their 14 centuries of slavery.
Islam calls for the extermination of Jews, however Europeans just in 5 years of nazism killed more Jews than all of the Muslim attempts to terminate them combined.
Show me some place where Christianity, in it's doctrine, does not support slavery? Hell, I'll go look up some scriptures.
Servants, be obedient to them that are your masters according to the flesh, with fear and trembling, in singleness of your heart, as unto Christ. -Ephesians 6:5
Servants, be subject to your masters with all fear; not only to the good and gentle, but also to the froward. - 1 Peter 2:18
Servants, obey in all things your masters according to the flesh; not with eyeservice, as menpleasers; but in singleness of heart, fearing God. -Colossians 3:22
There are many more, and I deliberately omitted any in the "old" testament, as Christians tend to try to wiggle out from under that , even if the Gospels and Apostles did say that not one letter of the law would pass away.