That's a fair position. But it's not an indisputable position, clearly. The biggest issue here isn't about whether there are fair points against the google manifesto. It's about whether thoughts, hypotheses, and opinions like this are harmful and punishable.
> ...many people feel very bad...
And many people feel bad that someone expressed himself earnestly in good faith and has been treated this way. Do we decide where to go from here from how people feel? How do we decide which feelings are important to us?
No, the person or persons that leaked it to the press did that.
Will google go on a witch hunt to fire all those people too? Likely not...
I though google was an open company when anyone can raise a concern when they feel like. It is what the CEO said after firing him probing that the company is not that open.
He send the manifest to a select closed group of people, not all the company. But it got leaked. You can blame him and you can also blame all the people who get angry with his opinions, because his intention was to improve the company not hurting people.