The Economist Magazine has critiqued Turkey’s new repatriation drive here: http://www.economist.com/node/21555531
The Economist points out Turkey’s nationalist stance is popular at home, but that it is hypocritical in the extreme. Turkey itself was an Imperial power and its museums --like those of other Imperial powers-- also contain artifacts taken from what today are other countries.
The Economist could have gone further. Isn't it also wrong for Turkey to lay claim to cultural artifacts produced by Greek culture when Turkey itself forcibly deported its Greek citizens in the 1920’s?