So we are now ignoring historical facts? The Arab slave trade is a historical fact a event that happened. That means the arabs travelled to the mainland africa... I cant take you serious if you are going to choose to be ignorant.
As for your question relating to being more moral than jesus, paul etc. This is why i know this is a pointless discussion. It is islam and mohammed that claims to be the perfect moral example for mankind for all times. Islam is the one that makes those claims. Not paul, not aristotle, paul or plato. So why should i have to defend them? You are making the claim, not me. I am simply saying that based on evidence, you have no grounds to make that claim. Mohammed is nowhere close to being a morally / perfect example for mankind. But you still pray to him and see him as an example for mankind.
I dont believe in Christianity or jesus, but i could look at evidence and say he did not enslave people, he did not rape the people he enslaved, he did not wage war or killed people. So Jesus, if he was real, would have indeed lived a more morally righteous life than Mohammed yes.