Effective altruism is based on the core belief that all people count equally. We unequivocally condemn Nick Bostrom’s recklessly flawed and reprehensible words. We reject this unacceptable racist language, and the callous discussion of ideas that can and have harmed Black people. It is fundamentally inconsistent with our mission of building an inclusive and welcoming community.
— The Centre for Effective Altruism
I think Jason's point is more that CEA's statement isn't really an attempt to 'communicate with the EA community', so your criticisms don't apply in this case. E.g. this statement could be something for EAs to link to when talking about it with people looking in, who are trying to make an informed judgement (i.e. busy, neutral people lacking information, not committed critics).