No one is owed FDO membership.
FDO is a community, and having people be treated with respect is crucial for maintaining this community. Letting people with a history of not respecting others be a part of that community is a problem, even if that behavior was displayed elsewhere.
It doesn't address the contents of this particular incident, rather it alludes to vague and nice-sounding moral principles thereby brushing off the whole specific issue. It is interesting, because by staying general the author gets to shrink from taking the responsibility of giving their actual opinion on the specific incident itself.
I don't remember since when "bowing down to threats" is adhering to CoC and "openly threatening someone over resolved conflicts under the suspicion of wrongthink" was "respectful behavior from community representatives".
Either way, it is always "we're just policing the bad people" until the bad person is you.