I wasn't literally asking why is this happening. I was pointing out that it's sad that we live in a world where someone like Crockford is spending brain cycles talking about semicolons, regardless of the reason.
In the big picture, I agree that everything about the GitHub thread, meta or not, is terrible.
But any author of a language minification library will have to deal with corner cases. I see no easy way out. Would it be better for Crockford not to have started writing JSMin?