I'm seeing this need for ideology purity pushed everywhere, in places where ideology should not matter. As far as I am concerned, as long as people are respectful they should be welcomed to contribute to the project.
I try hard to work with projects which are not Western-centric for this reason or at least which have a commitment to a community which admits of disagreement on issues.
>Less well known is the paradox of tolerance: Unlimited tolerance [i.e. "diversity at all costs"] must lead to the disappearance of tolerance [i.e. the ability to agree to disagree]. If we extend unlimited tolerance even to those who are intolerant [i.e. heretic-hunting ideological conformists], if we are not prepared to defend a tolerant society against the onslaught of the intolerant, then the tolerant will be destroyed, and tolerance with them.
Tolerance is not enthusiastic embrace, but "the willingness to accept or tolerate someone or something, especially opinions or behavior that you may not agree with, or people who are not like you." These heresy hunters are strictly intolerant by the meaning of the word and destroy the predicates of a tolerant society.