FWIW, I think anti-capitalist sentiments are mostly a product of a bad economy. Once we're back to full employment and growing steadily, people will swiftly jump onto the pro-capitalist wagon because they will see the upward mobility of their own lives

A secondary reason is a little more obscure: the GOP keeps backing capitalist rhetoric, but nobody believes them because of other problems attached to their brand, like social conservatism and anti-tax hysteria. For example, there really is a whole lot of truth to "job creators", but very few people believe it because they see this rhetoric not matching the policy. Even though the GOP loves the idea of "job creators", they're too much in the muck of other problems to even understand how to prove the rhetoric is true. The GOP thinks the Grover Norquist approach of slash slash slash is pro-"job creator", but it's actually anti-"job creator"