Islam in America: What you don’t know about Islam’s U.S. roots.

“A lot of people might assume Muslim immigration started in 1965 when the U.S. had a period of immigration reform, others will date it back to the 1979 Islamic revolution in Iran, yet others to the 9/11 attacks, but usually no one looks farther back than the 1960s and certainly not beyond the 20th century for this history at the popular level,” said Hussein Rashid, who teaches at Columbia University.