I think it's understandable that some might turn around and go if Josh can take a team friendly deal then why can't Cook. I understand where you're coming from, with the huge difference in sizes of contract, but sympathy is going to be limited when Cook is still earning millions of dollars - far more than nearly every fan.
It's just one of those things. And, to out it bluntly, Cook put it out there by his actions on social media. If you don't want callback from the public, don't make the request public in the first place.