I'm not sure if just this individual is upset, or if he's speaking on behalf of the entire community he's the leader of.

I think it's clear that Mozilla wants machine translation to take a bigger role in producing localized content, and this new process will be a large shift in the way things have been done. I think it's fair for Mozilla to do this, but I also think it's fair for the maintainer to be upset with this decision and no longer want to volunteer his time to clean up slop.

The initial response feels premature and tone deaf which is why people are irked by it.

Given that Mozilla "shot first" so to speak, the onus is on them to take action first e.g. disable the bot, revert changes to articles, etc. Only after doing this can discussion on a path forward happen.

There is no such person as "Mozilla". There is Kiki, a "Support Community Manager", probably a relatively low-level worker (but it doesn't matter much if she is actually has some weight in the organization). So, you are Kiki. You just saw that message. What do you do now? Just ignore it? Do not respond anything and immediately call the CEO and try to convince him/her that he/she must order to disable that auto-translation bot, without even trying to gather more information? No onuses and stuff, what are your actions, exactly?

Because a lot of people in this thread are whin… ahem, expressing their discontent with Mozilla, as we all usually do, but I've yet to see anybody to propose anything realistic at all, let alone better than ask an offended community member for a call and at least to try to talk it through and establish what could be some actionable steps to remedy the situation.