Regarding your statements about Catholics having no moral obligation to live in a nuclear family, I’m not sure what you’re getting at, since I didn’t mention Catholics in my post. Many if not most people also don’t get full choice over their family structure; spouses leave or die, children don’t get to pick their parents, and we don’t fault people morally for things that are beyond their control.
My point is that this website is very definitely pushing just about every kind of family model other than the traditional male dad + female mom + kids model. I will be honest and say I personally don’t care much about that, for a variety of reasons, but there are a great many other Catholics, as well as a good many Protestants, who do care and who think that the moral decline of society is caused by the disruption of the nuclear family in the ways BLM is strongly indicating on its website. If you want to advocate for that, fine, but it’s not going to go over well with the average Catholic.