If you aren't forward looking, you aren't likely to go into science. This makes most scientists "liberal" in the sense that they want to change and improve things, because that's the mindset you need.

When science goes wrong is when the scientist's idea of "improving" things becomes corrupted, which I think is the root cause of many being complicit in the Reich and also racist, or what have you. If white supremacy is part of "better" for you...