Yes. The BM argument for retaining some antiquities is that while yes, much of this material was looted or part the trophy hunting and asset stripping of various Grand Tours, that the top end level of conservation/curation and the free visibility of these antiquities, means they are shared with the whole world in a world context, interpreted and appreciated. They have not been lost, or destroyed in wars as have many world treasures, but numbered and annotated with their provenance recorded etc. And there is, in my view, some validity to this, despite the colonial origins of much of the collections. A trip to the British Museum is an amazing experience, I would recommend it. But yes, they should give it back, provided those taking possession are genuine representatives of their community, and have some kind of plan.