Why don't you buy NUFC then you could do what you want to with the club, the team, the fans etc. You could appoint who you liked to help you run it. All it will cost you is £300 million or so. I didn't see any boycotts or the like when Sir Bobby Robson was fired and he was a far better manager than KK.
I'm not a Newcastle Utd fan admittedly but I am concerned with the direction football is taking generally. This current situation does smack to me as the tail wagging the dog.