I agree with almost all of this, but this part is very unclear and vague: “promoting […] authoritarian systems and practices”. What is your definition of “authoritarian” here? The interpretation might be very different depending on who you ask, even including any state government according to some anarchists.
Edit: I also found this sentence very complicated, and had to read the previous discussion to understand what it means. I believe it could be rewritten in a clearer way, by splitting it into two or more sentences. “With that in mind, we do not welcome participation (however polite) by contributors to projects which are designed or primarily used for…”
Edit: I agreed to the statement because it keeps bugging me and I dont plan to talk about politics on here anyway. Still I would be curious about a reply to my doubts.