That was a silly thing for McCain to have done... of course there was much to fear from a President Obama. Like the worst presidential policies in American history. It had everything to do with the color of his politics, not the color of his skin.
McCain has done and said a lot of silly things. He wasn't a serious candidate because he's no longer a serious man -- just an opportunistic political hack.
I’m not so sure about the “worst in history” thing. We tend to think in terms of those in our lifetimes. FDR and Wilson were long before my lifetime, but they were AWFUL. Even Obama hasn’t done some of the things they did, yet....but he’d go there if thought he could get away with it. Such as shutting down publications and throwing people in jail if they disagreed with him...and FDR invading farms and destroying livestock by the thousands to prop up prices, when people were hungry. They were idiots in so many ways, but that’s what we seem to get, megalomaniac idiots. But who do we blame, when they come out of our ranks, and we vote for them, as a people? It sucks looking in the mirror.