In a nut shell, we have created new special interest groups that are, as in the past, "More than Equal" where there is a conflict between beliefs / social modes etc.
In the case of the nursing baby, if the mother was not prepared to accommodate the request to cover up (more than equal), then I guess the crew could have simply issued a "night mask" to the complaining passenger to be used while the feeding was going on.
I live in hope that the pendulum would / may sometime go to a center position where everyone attempts to consider and comply with the beliefs of others, of course that will never happen but...….