The podcast If Books Could Kill manages to stumble on a fair amount of overlap between "power of positive thinking" / "The Secret" crap, and right wing politics in the books they review.
The sheer volume of "woo" and positive affirmation manifestation among my friends is vastly higher on the left side of the spectrum than the right.
Perhaps it's more to do with extreme personalities and wishful thinking.
That stuff is mostly harmless speculation/belief, and isn't equivalent to outright denying reality and seeking 'alternate facts'.