The democratic process, when used for political decision making, creates the appearance of legitimacy, and invokes the natural human herd mentality to stifle dissent. The main difference between regular democratic decisions, and political ones; is that the former are voluntary, and applicable to all participants; whereas the latter are unilaterally applied to all, regardless of real consent. Try applying this to regular situations, such as shopping, or love making, to see why this is bad.