Since humans are social organisms, the arbitrary exclusion of any group is immoral. Also, exclusive behavior, aka segregation, is abusive and the expectation that the victims of abuse are capable of stopping the perp is unrealistic. All abuse requires a third party intervention to be stopped. Indeed, that is likely the main purpose behind organizing what we call government. And if that is the case, then legislative support for exclusive behavior is not just immoral, but counterproductive. Segregationists undermine the very purpose of social organization and so those who oppose them are providing an indispensible public service.