Your assertion is also an ad hominem. You can have a person that likes Google and its products and that hates this "open" letter. You can also have a person that hates Google because of its displayed hypocrisy from times to times and still likes Apple ... it's perfectly acceptable.
Not everyone is for "openness" and not everyone should be. Surely some economic, business or social models work better that way, but there's no way to tell if its the "be all / end all" since most models crack when it comes to scaling.
And Google is displaying some hypocritical behavior here since the crown jewels that actually generate money are closed. That isn't bad (they are a business after all) ... but confusing and damaging users is not the reason, and sending signals like that is just dishonest.
(although I've experienced working in a corporate setting before ... that man may actually be honest ... sniffing the company's values like cocaine is actually quite common :)
Merry Christmas.