As for me and my family, it was an average moslem, somewhere between the ages of 40 and 50 probably, who did threaten me and my children and my husband with a machine gun as we were dropping off another family (which was moslem) at their destination. It did not happen in the US but it happened on December 19, 2001 in a country in SE Asia.
Indonesia has the largest Muslim population of any country and it is known for it's radical terrorist groups, it wouldn't be unfeesible to say you might have met a radical in SE Asia from Indonesia, but again I'm not sure.