NEW : Imam calls on Americans to confront radical Islam . He says he is aware of warning that this could cause problems for American Muslims . U.S. embassy deplores disrespect against Islam . Quran - burning pastor is ` ` really quite uninformed , '' the imam says .
NEW : Pastor calls on Petraeus to confront radical Islam . He says congregation is aware of warning that act could cause problems for U.S. troops . U.S. embassy deplores disrespect against Islam . Quran-burning pastor is `` really quite uninformed , '' Atlanta imam says .