I mean, they seem to be against anything that would affect American citizens positively.

I suggest you go to your local library and check out, or request via inter library loan - William Connolly - Capitalism and Christianity American Style. It builds on Max Webers work on the early Puritan influence into economics (The Protestant Work Ethic). Connolly incorporates much of his contemporary philosophy to try and explain the bootstrap mentality, cruelty politics, and the modern religious nationalist movement. Plus the book cover is metal.

Social darwinism and galtonism.

This is why I’m so disgusted every time someone says “republicans and democrats are basically the same”, which I most often hear from Europeans.

Because that is what they paid to do?