The Boston Globe ran an excellent op-ed piece on this subject today.
Shrub continues to do the American people a great disservice, turning Ground Zero into a monument to America’s culture of victimhood. If our diplomats visited Ground Zero with Ahmadinejad, it could be an opportunity to start reversing our country's course of alienating Iran. This alienation only pushes our nations closer to the brink of war. Instead, Shrub, Hillary Clinton, and Rudy Giuliani are perversely united in denying Ahmadinejad a visit to Ground Zero.
While I am no fan of the current regime in Iran, continuing to insult Iran does not serve our nation or any other. Finding a way to step back from the brink would be a much more suitable memorial to those who died on 9/11.