If Aya Sophia's back to mosque conversion is a great job then in India conversion of Babri mosque back to Mandir is also justified. Aya Sophia was also a christian church earlier.
Babri mosque was made by mogul king ZaheerUddin Babar in Ayudhia state over a demolished old mandir as Hindus of today claimed. Why muslim were so upset about it.
Muslim made hundreds of mosques in their era of Spain, but when Christian came back to power after eight hundred years they burned many and sealed all incl Alhambra mosque, killed all Muslim male population.
Properties made by others can not be ours in any state, law or power.
There are two undisputed mosques in the world, first was made by Prophet Ibrahim (as) in Mecca and the other is Madina Mosque made by prophet mohammad (Saws) himself.