Anything non-falsifiable is irrational.And the Nazis who escaped Germany and hid in the United States and used their ill-gotten money to found many of the book publishing companies that produced the education books and the books we use for history today, those companies didn't have a lot. Good to say about Nazis. You know why? If they said good things about the Nazis they'd give up the game. I wouldn't expect a socialist information site to say a lot of good about communists. That would give up the game. Of course they have negative things to say about communism and socialist regimes and everything else. If they said that socialist regimes and communist regimes are wonderful things that should be celebrated and pursued because this is what the world needs in order to overcome the evils of capitalism.... Everyone would know it was a communist site. Are you really that stupid?
What you present there is an epistemically closed argument -- any conceivable evidence that RationalWiki is not "socialist Wikipedia" can be twisted to show it is.
That is classic conspiracy-theory thinking -- as you can learn from RationalWiki.