No, the Elgin marbles are irrelevant in this. The British empire (boo, hiss) bought them from the people who stole them fair and square. They have never claimed them as their own culture, just property. You can definitely say that the ancestors of Normans and Saxons claiming Stonehenge as theirs is cultural appropriation. And, in fact, the modern Greeks claiming the Elgin marbles, since they share almost nothing, genetic, cultural, linguistic (look up “Hellenization”) with the ancient Greeks except geography.
