I had no idea there was a Blizzard employee with the last name of McCree because I don't follow the employees of Blizzard whatsoever. I think the new name is meh and I miss the old name.
Even if people knew there was an employee with this name, it doesn't mean they are showing solidarity with him if they like the name McCree. It's a name, and a cool one at that... cooler than the new one.