I've been accused of both arrogance and stupidity before. Doesn't bother me.
The problem with your argument is that the two statements and their concomitant corollaries are not mirrors.
There's no evidence that large numbers of voters who disagreed with Romney voted for him because he's white.
On the other hand, large numbers of black voters (ie, church goers) say that they strongly oppose democrat political positions, and still vote for Obama, by most accounts over 90%.
You will never convince me that people who say they stand for one thing and vote for the person who opposes them are doing anything but voting on skin color.
Blacks and Hispanics are more racist than whites. Sorry if that bothers you.