Notice the use of the word REVERT and not CONVERT. As Muslims we believe that all human beings are born Muslims, so if a non-Muslim comes back to Islam he/she is a revert.
The following excerpt is taken from http://johnw.host.sk/articles/converts/
Malcom X
There were tens of thousands of pilgrims, from all over the world. They were of all colors, from blue-eyed blonds to black-skinned Africans. But we were all participating in the same ritual displaying a spirit of unity and brotherhood that my experiences in America had led me to believe never could exist between the white an d the non-white…America needs to understand Islam, because this is the one religion that erases from its society the race problem. Throughout my travels in the Muslim world, I have met, talked to, and even eaten with people who in America would have been considered white – but the “white” attitude was removed from their minds by the religion of Islam. I have never before seen sincere and true brotherhood practiced by all colors together, irrespective of their color.