I am not a Ron Paul fan, per se, in part because I believe Israel deserves favorist treatment, but the answer to your question is simple.
Ron Paul is “crazy” and supported by “crazies” because WE as a nation have in fact become “crazy.” We are SO FAR from the Founders’ guiding principles that almost any path - even if it is a path which should return us to those principles - seems to lead to darkness.
We're not all crazy. In fact, I'd say that sane folks are still in the majority in America.
But I get your point. Seems there's a lost segment of the population that gloms onto Ron Paul because they see a kindred spirit in him.
Ron Paul is a path to nowhere.