You could complain to the airline because they made nonsensical threats. Since you think this may have happened because you were the only non-white on the plane, you should contact the airline or travel agent and ask them to update your profile so that you are only booked on flights with other minorities. That will help ensure this doesn't happen in the future.

There's no way a federal prosecutor would spend any time on this matter, even if they were to convince someone to have you arrested. Even then they'd have a difficult time, as nothing you did meets the criteria for "international terrorism".


http://www.law.cornell.edu/uscode/text/18/2331