Half the cabbies in DC are probably Somali.
I doubt there are many non-Muslim ones.
Did she leave a tip?
Just a reminder that every nationality has a wide divergence of views on many topics including religion.
If anyone steps into a cab in any city wearing garb that signals a religion or political view the results are... unpredictable.
That is called the _real_ world—whether the snowflakes like it or not.