While agreeing with that, Delta should still be held responsible for getting him to his destination on a reasonable schedule, the costs of his accommodations, and his and his wife's wasted time.
If Delta should be reasonable (getting him accommodations) shouldn't he also be reasonable next time he gets on one of their planes?
Logical inference does not work the way you'd like.
How is one to be sure what makes others uncomfortable? In your view, in th years after 9/11, Sikhs (who wear turbans) shouldn't have traveled at all... as they looked too much like the dreaded Bin Laden.