deniasphere 

The realm inhabited by those who refuse to accept any information that might conflict with their preconceived notions.

The inhabitants of the deniasphere still insist that burning fossil fuels doesn't affect the climate.

deniasphere by Cynicool July 19, 2017

Denialosphere 

The sphere of denial regarding scientific facts refuted by religious leaders, republicans and the corporatocracy.

"Wow, the same people who deny evolution are denying global warming now. The denialosphere is really buzzing with misinformation."

Denialosphere by Marshall Peck November 5, 2008