Nobody said black racism doesn't exist. They've merely pointed out that your laughable use of a correlation fails to prove the sort of widespread racism you seem to be searching so hard for.
Yes, there are probably many blacks who are voting for Obama because he's black. There are probably many whites who are voting for Obama because he's black. There are many people who are voting for or against either ticket based on race, sex, age, etc. What bold new conclusions can you draw from this fact set? None.