Outlook has a report on how the excavations in Ayodhya are proceeding. The article portrays a “balanced” view, i.e, it makes it seem as if the pro and anti-mandir guys are squabbling over the interpretation of the evidence that is turning up. But to me it is looking as if there is pretty strong evidence in favour of a temple turning up and the anti-mandir guys scoffing at them, claiming that the evidence is not yet enough. My bias may be showing, you decide.
In any case, the historical question of what Babur did in the 16th century is different from the ethical question of what we should do now. I think that there is evidence that Babur indeed demolished a temple to build the mosque in question, but that does not mean that Hindus should have returned the compliment.