This article is long; but IMO worth reading. Republicans often KNOW the truth but choose to ignore it and live in a bubble of lies. I'd go so far as to suggest that BK often goes down the same rabbit hole.
When Fox and others can have their messages fact checked and proven false- REPEATEDLY- they are engaging in "motivate ignorance", choosing to not pay attention to facts. They can easily find the truth; but they choose not to and then try to get others to accept their version of reality. Kelleyanne Conway should have disappeared with the Trump administration; but she's still out there peddling "alternative facts".