Environmental issues did in fact exist before capitalism. Human arrival coincided with mass extinction in the Americas and in Australia. That’s certainly not to say these issues are unavoidable or that socialism isn’t the solution (because it 100% is) but we should see environmental issues as transcending others so I disagree that I would place this in an eco-fascist lens. Rejection of science certainly occurred in feudal societies as well
People who talk of “human nature” are white supremacists. The idea is that groups and people with different cultures are not human is what underpins this whole concept