Because Delta is building a hub in Seattle, they are official sponsors of the Seahawks. It's a competitive market up here, and they had to keep up with Alaska Airlines, who named Russell Wilson their "Chief Football Officer".

I think highlighting that sponsorship on their homepage is reasonable, and would probably stop short of calling it offensive. But they probably should be geotargeting better to areas where the Seahawks are popular...

Just be glad Delta picked the Hawks to sponsor - I'd rather not fly an airline that underinflates the tires on their aircraft . (Ducks)