I would give Americans a little more credit than that. Talk radio, FOX News and conservative web sites flourish precisely because there is a market for them. The Academy, the media, and popular culture are still dominated by leftists, to a significant degree because socialist leaders made it their goal beginning in the 1960's to undertake a "long march through the institutions", an effort in which they largely succeeded. Now we (traditionalists and conservatives) are fighting back by offering facts, context, and history that many people would otherwise not be exposed to, and the powers-that-be do not like it one bit.
You're correct except that it started in the 30's.....