(CNN) The real fear that many on the left have is not that Bannon is dull and uninteresting, but the opposite — that his ideas, some of which can reasonably be described as evoking white nationalism, will prove seductive and persuasive to too many people. Hence his detractors' solution: Don't give him a platform, and hope that this will make his ideas go away. But they won't. In fact, by trying to suppress Bannon and others on the right, liberals are likely making their ideas seem more potent. Did the efforts of communist countries to muzzle capitalist ideas work?