He isn't claiming to be a mother though, so I don't really understand a lot of the grievances with this.
There are only two slots for the parents names on a birth certificate and unfortunately in this country one of those slots is titled 'mother'.
I strongly believe this should be changed, as it has in other contries, to say 'parent 1' 'parent 2' and then maybe an option for 'relationship to the child' ie, mother/father/surrogate/other.
I imagine fathers in DG & EJ's situation aren't exactly thrilled about the fact that they have to be listed as 'mother' on their DCs BC as they aren't a mother.
I also don't understand why so many are getting offended by the suggestion that a man may want to be referred to as a mother, it's only a word, a title, a term of endearment.