From what I'm gathering, it seems like one group is more "traditionally" American racism... And the other group is more like WW2 Nazi racists?

Either way, they're racists and not worth the oxygen they're consuming.

Can I just continue to have incredible distain for all racism? Because I'd hate to be branded as a sympathizer to either group. They both sound horrible.

The only surprising thing to me here is that racists hate eachother enough for this level of violence. I don't necessarily consider that a bad thing, I just thought they would... I dunno, bond over their mutual hatred of other races, rather than fight eachother over who is more racist.

... Not that I'm complaining. Having racists kill other racists makes it easier to fight against the groups that remain. Both groups of racists deserve to be put down. Not that I have the ability, capability, opportunity nor motivation to do that work myself..... I'm just not going to complain when one group kills the other, and the first group ends up in jail for life because of it. Honestly, that's an absolute win IMO.