@Rhakim is there a campaign to replace mosques with hindu temples?
If it was originally a hindu temple as some claimed why did the hindus destroy it?
There's a law that says you can destroy a religious structure if you can prove another structure was there first, even if the current structure was 500+ years old and no one remembers the original structure at all. The law is clearly meant to favour Hindus since they are much older in India than Muslims. It's just a dumb law when you think about it, because there's a temple in every third house, but if some family decided to convert to Islam or Christianity or anything else and takes down their temple, someone else centuries later can use that temple to claim priority. So yes, some Hindus abuse that law to try to replace any non-Hindu structure they can, especially prominent ones.
In this case, no one really knows if there was an original temple or when it was there or what happened to it. There were some rumours but they came centuries afterwards. There's even s controversy over whether that mosque was built around 1500 or further back in the 1200s, and we know even less about what came before it.