Sorry but that doesn't look like a baby, looks like a miniature adult suffering from condition called Progeria lol
I think that question is looking at the differences and dividing with some implied beliefs that some Christians are better than others or that their faith is right and others are wrong.
Remember Christ's words: 'Mark 3:25 And if a house is divided against itself, that house will not be able to stand.' I think seeing everyone just as an equal brother Christian without any human-added definitions is a really noble and right way to think about it.
@Limad No, that is not correct, neither from an Orthodox nor a Roman Catholic perspective. And not even from the perspective of the early reformers. Doctrine is important. I could quote many verses which support that, as well as the testimony of the Early Church. I am not willing however to debate theology on someone else's profile. If you wish to discuss this send me a private message.