Actually, one can interpret the 1907 Hague Convention to mean that it is illegal to acquire territory by force. In which case, we should be required to give the whole thing back to the Ottomans. Not to mention that Poland should be required to return Silesia to Germany.
Magnitude 4.2 quake strikes near Grand Coulee Dam in Washington (Reuters)
from the article: On eve of Obama-Netanyahu meeting, Abbas offers Jerusalem compromise