What do you mean, "in all honesty"? Unless you were privvy to the evaluative processes for the award, what you're saying is pure speculation.

No, they gave it to him "for his 'extraordinary efforts' to strengthen international diplomacy and cooperation between peoples".

At least if they had given it to him for being black, they wouldn't be lying through their teeth

They should have waited 3-4 years to see if he would actually accomplish something beyond getting elected. I'm not saying he didn't accomplish anything, but traditionally a great honor is bestowed for achievements past, not potential achievements.

I assume that there are a lot of black presidents e.g. in Africa, I don't think a lot of them got that award.

That is a good point. A step in the right direction for humankind.

The problem is, despite appearances, the new boss is the same as the old boss.

That's pretty ridiculous. You are really misrepresenting what happened. Sure, you can say it was little more than for a promissory note of peace, which is what people were saying at the time but this is just too much.