Like any human endeavor, open source contains an implicit expectation that everyone is going to behave reasonably. You can disagree with the author’s arguments that this behavior is unreasonable, but it kinda misses the point to say that open source authors can do whatever they want and nobody has a right to judge them. When I’m a guest in someone’s house, they have every right to do what they want, but if they decide one day to bellow a war cry and start smashing their plates I’m probably not gonna visit again.