Good point, the historical Buddha, Siddhartha Gutama (sp) was born in the mountains of northern india, he was a prince, with a wife and kids, then he had his epiphany and supposedly did all that crap that is attributed to him.
Allah was never meant to have been on Earth so how can you say that he was an Arab black man? You can say that about Mohammed (his prophet according to Islam) but you cannot say that about Allah.
Similarly Jehova (sp?) was never meant to have actually been manifested on Earth. So you can comment on the racial makeup of Jesus but not actually Jehova.