They are nearly all authoritarians. You can read about the psychology here:

https://theauthoritarians.org/Downloads/TheAuthoritarians.pdf

The short version is that they are driven by fear, and fear makes people seek out strong groups to protect themselves. Once they identify with the group, they replace their own morality with loyalty. Now, anything that helps the group win is good and moral, and anything that helps anyone else is bad and immoral.

Once you understand how they think, their actions make a lot more sense.