I think you're missing their point.

Indy was always "it belongs in a museum" when its an intricate part of some foreign nations history. That museum always seemed to be British or US.

The point being they're just stealing their history back. A reverse Indy.

"It belongs to the culture it came from. Allow them to choose what to do with it. Perhaps they even have their own museums."

The Vatican is a museum whether you like it or not