I'm an Obama supporter but I have to ask: Should we build a German Cultural Center right next to Auschwitz now?

Your point makes no sense, as Poland does not have a Bill of Rights like the US does guaranteeing freedom to practice religion, and a German cultural center is not a religious building. What should really scare you is the scapegoating of Muslims by right wingers like Palin and Gingrich. Hitler used a similar tactic to justify the murder of 6 million Jews.