here's a timeline that tracks the development of this absurd right-wing "ground zero mosque" meme:
How the "ground zero mosque" fear mongering began - War Room - Salon.com
the article tracks is back to a single racist asshole conservative blogger, pamela geller.
not sure if it's quite as linear as the salon piece maintains, but it's nonetheless interesting to have a narrative to point to that shows something of how a meme comes into being. lets you see the underpinning of the raft the right would fill with racists.
btw i think it's a **really** dangerous game the conservatives are playing, legitimating american fascism as they are.