why? because the richest people in the world continue to believe in and promote the fairy tale, and unfortunately, they own the media outlets which feed the fairy tale to everyone else.
Same reason (though obviously less extreme) is how Republicans get the majority of media coverage whether they are in the majority or the minority. Same reason coverage of their ideas (lack of ideas, more aptly) get equal considerations to Liberal ACTUAL IDEAS for making people's lives better.
I can argue for hours about how Liberalism is insufficient and imperfect, but the reality is that at least Liberalism is based on what closest resembles our shared reality. Conservatism longs for the days of absolute monarchy and aristocratic rules. Kings, Queens, and lords bullshit!
However, as I said, the wealthy control both the means of production and the means of mass communication. We all have, in our minds, at very least, bits and pieces of the propaganda that "wealth endows people with virtue and we should give them deference" While Nazism is one of the most extreme forms of right wing ideology, substituting Nationalism, Race, and Mythology for the typical Conservative ideas of Wealth and semi-aristocratic leanings, it nonetheless serves to move, or to keep the Overton window to the right.
Conservatives have always sought (and often failed) to harness the power of extremism to maintain their power. It typically ends in ruin for them, but because the ideology (Conservatism) is never fully eradicated, they always come back.
They retain most of their wealth and a lot of their power. What did Prescott Bush and his "Business Plot" buddies lose when they tried to stage a right wing coup against FDR? What did the Senators and Representatives in the 1930's and 1940's really lose when they worked with the actual Nazis. What did Nixon lose for his part in scuttling the 1968 Peace conference with Vietnam to hurt Humphrey? What did Reagan lose when he made the dirty deal with Iran to keep the hostages longer to hurt Carter, then sold them weapons illegally?
Unfortunately, Conservatives seem to control the narrative and until we find a way to defeat that, it will remain so, and people will be fed the standard Conservative lie AND more extreme ideologies from the right wing.