And what have you to say about the MUCH larger (in terms of numbers of dead) and longer-lasting (it may still be going on under the law's radar) trans-Sahara slave trade which brought 18 million Africans to the slave markets of Fez, Tunis, Cairo and, yea, Mecca--and left the corpses of 120 million Africans in the desert?! And the Muslim religion which blessed all this?!
Google up John Azumah Adembillah's The Legacy of Arab Islam in Africa and read that book. It will tell you plenty you may have never wanted to know about the slave trade I mention here!
Oh--and remember, the first humanists were Christians, not Muslims--and the Jews, not the Arabs, are the indigenes of that land! You want to argue that indigenous status has an expiration date, be my guest--but I dare you to try that argument at any native powwow or Maori luau!