A US Army colonel who was suspended from a top military college for teaching an anti-Islamic course is threatening to sue America’s top general for “violating academic freedom” and “caving in to Islam.”

Lt. Col. Matthew Dooley’s attorneys have put Chairman of the Joint Chiefs of Staff Gen. Martin Dempsey on notice for a possible lawsuit for “concealing the truth about Islam,”...

Some of the material used in the class suggested that US President Barack Obama is a Muslim.