The Greek Parthenon in London

In June I was in the Akropolis Museum in Athens and saw reconstructed Parthenon, actually a part of it. Where is the rest? Here, in the British Museum in London. So I went to see it.

I believe it should be returned to Greece. But here is what Britons say about the acquisition of the Parthenon and how they praise this act (as if it was the greatest favour they did to the sculptures:

So now I have seen the entire Parthenon (within a few months interval).