I can appreciate Google's stance as Microsoft is a direct competitor in every single space they occupy. So I see Google's tactics as strategic, albeit annoying.
But the CEO of Instagram hating Microsoft is pathetic. What kind of an idiot takes such a personal stance against a corporation that presumably hasn't personally wronged him? Not only that, but Microsoft has indirectly contributed to much of his success. If I had to guess, I'd say he's one of these guys who has an irrational love of everything Apple and with always comes the apparent need to hate everything Microsoft. I've encountered way too many of these kinds of people in the past.