I have a soft spot for children's literature so it does hurt to see agendas be pushed on vulnerable kids.
I will say though, having books like "my two dads" and "my two moms" are really great resources because kids will internalize a lot of things and blame themselves for being different. I'm never going to say no to a new piece of media depicting a home life that's not the norm. Kids shouldn't feel bad because of what their parents are, and as we all know from a lot of the cows documented on the site, having two loving parents is more than a lot of kids can ask for.