When you figure out why this man is brought to tears by the Star Spangled Banner, you will finally understand the appeal of the Tea Party GOP.
Moreover, when you figure out why this man is crying you will begin to grasp the difficulties faced by appeals to reason and empirically driven reality in trying to beat back the emotion, faith, and fear based nationalism of the Republican Party.
Consequently, reasoned discussions of policy and good governance are made secondary to a sense of belonging. For folks who feel alienated, scared, and "want to take their America back" (from "the blacks, the gays, the atheists, the Socialists, the liberals" etc.) a sense of belonging is a powerful salve for alienation and anomie.
A key point. When the ghouls in the audience at the last three Republican debates howled for murder, death, and in support of hatred towards Americans who happen not to be straight, they were marking out the boundaries of their political community. Their cheers were not those of outliers; they were the id of a community that stood silent in complicity and agreement.