They have a simplistic tit-for-tat moral code

The alternatives are limited to “my group is always right” and “I pick one aspect and ignore all others, and the one aspect is always arbitrarily chosen, and when the comparison kinda equals, the result is arbitrarily chosen”. If you have any to add, you are welcome.

And the word “simplistic” is usually used by people unable to defend their position with actual points. It’s kinda useless otherwise.

and ignore the relative degree of contempt telegraphed by different ethnic slurs.

Since it is not given here what the particular slur would be compared against for any “relative degree”, your comment clearly presents you as someone who

tends to not be very bright

, and the advice I won’t accept wasn’t answering my comment. I said that a continuation of an argument doesn’t say much about the beginning.