Repeat after me - destroyed by Islamic invader in 1568.
Difficult to revive as a temple.
Who to blame ? Hindus ?
Protection of old monuments was not in vogue. They instead built new if required. Mostly they didn't have to build, unless fellows like Suleiman Karani came along.
Who made it defunct is main question.
Again, Konark artefacts were given a reborn status at Puri.
Real vandalism was breaking the temple.
Credit to British though, for systematic and scientific study. But, it is a new science - preserving old places bcoz de are old