Impure + Manhattan : Oxymoron ?

Most of the world has always admired and even envied Manhattan and wished they could be among its residents, if only for a year or two.

Agreed, a significant minority of us has also always hated and loathed Manhattan and wished they could bomb and burn it to the ground.

Still, on balance, 'Manhattan' has long been seen as a highly positive word.

While 'Impure' has usually been seen as a very negative word.