In any case, Wolfgang, if I may be the devil's advocate to your statement...

Even people who are catastrophically wrong (like the Nazis) may and often DO make isolated statements that are in themselves quite accurate...while using those statements within the context of a larger wrongful intention!

That doesn't invalidate the accurate statement itself.

I bet even Joe Stalin and Al Capone made some very cogent and astute remarks in their time. Criminals and scoundrels do not oblige us by uttering ONLY exaggerated lies and obvious misrepresentations...they frequently sprinkle some cold, hard truths among them. It is precisely in that way that they succeed in persuading many people to side with them, don't forget.

Only a fool would tell nothing BUT lies when attempting to persuade people of the rightness of an extreme position.

The Far Right in America also tells the truth about certain specific matters...while generally presenting what I would term a destructive viewpoint on things in the larger context.