"What usually matters to a child is 'sameness'. Same as peers in class. They tend to be very conservative. A good parent knows this"
And instead of trying to raise children to accept differences, we should stop the differences happening?
lets get rid of all the ginger children too, and disabled ones, oh and any that wear glasses or have parents that dress a bit oddly.
Oh and very few children in my DCs classes live with both their parents, should I kick their dad out so that they fit in?
Children don't come with an inbuilt idea of what constitutes parents or a family, they see theirs and assume it is normal, meet others and learn that they come in many different forms, it's not hard to tell them that some children have two mummies or daddies and why, just like it's not hard to tell them why some children only have one parent or are raised by grandparents, or have one mummy and a daddy that lives with them and a daddy that doesn't.
I managed to do it with my children - unless you're saying that mine are clearly geniuses who understood what other children wouldn't?