What I described in the first two paragraphs there.

> This is a flamewar comment, which makes it bad for HN regardless of anyone's politics. But you particularly have no right to do this in the context of a personal blog post by someone whose intention to improve society could hardly be clearer.

> Large institutions are complex, neither completely good nor completely evil. I don't think that's too much to ask users of an internet forum intended for intellectually substantive discourse to understand.

Except you did not intellectually substantiated anything, but your own/company's opinions.

Nor it makes sense for you or anybody else to arbitrarily mark the parent as a flamewar comment.

You are very free to have and express your own opinions, you should others have and express their own, though.

I'm a moderator here, so it's my job to set these expectations. That inevitably involves judgment calls, a.k.a. opinions. I'd say the lines we draw are far from arbitrary, but of course I'm biased.