This is absolutely not the case. When you break issues down, the average Republican voter supports a ton of Democratic policies, especially economic policies. They're willing to vote against their self-interest because they've been led to believe they're superior to other groups, namely racial and ethnic minorities, LGBTQ, non-Christians, but most importantly "college educated liberal elites." This feeling of superiority is a fucking drug, and it makes them ready to want whatever their leaders tell them to want rather than the other way around