So the thread title is a lie--no Republicans called Giuliani stupidest of their party. The rest of it is a non-story. Giuliani was right about Obama from the beginning. Here is his 2008 convention speech. Start about 6:00Oh snap.
"Instead, Giuliani's comments left Scarborough wondering if the nation is "really going to go through another cycle where Republican candidates are too stupid to get out of the way of the stupidest people in their party, that keep them from winning presidential elections by spewing hatred, instead of telling people how they're going to get back to work," he said."
As Giuliani Stands by Obama Claim Others Warn of Stupid Slurs