[dalke]

> Either forbid all racism or allow everything.

It does prohibit all racism. ("We will not tolerate discrimination based on any of the protected characteristics above [including race]".)

It's impossible and unreasonable to forbid all discrimination. It deliberately discriminates against racists, for example.

"Blatant incivility" would not be welcoming, so would be counter to the stated goals. The statement is instead that 'Communicating in a ‘tone’ you don’t find congenial' is not an actionable complaint.

For example, if you believe otherwise then - and to use an example of a tone argument that I do not mean to direct to you - "Why don't you calm down and we can discuss this like adults?" This is a tone argument which implicitly and incorrectly assumes that only someone who is emotionally upset (and likely unjustifiably so) would have made that sort of statement.

I believe the overall policy is along the lines of "keep a civil tongue .." that you propose, though with more details about what is considered "civil".