The map would have been pretty similar for the white Democrat before the black guy I'd imagine. You were looking too deeply. The map says white American man tends to vote Republican, thats it
Also, it only shows the electoral votes, which don't paint the whole picture. Yes, it certainly shows a trend, but very few states actually split their electoral votes. Example: if Tennessee votes Republican by one vote, all the electoral votes go to the Republicans.
So, the map shows that 7% of the electoral college votes would've gone to Barrack, yet 39% of the votes made by white males were for Obama. Yeah, it's still not a high percentage, but it's also the same percentage that Bill Clinton received in 1992.