Sir: In September 1939 Britain declared war to protect Poland. In 1945 the extent to which Britain and her allies had assisted the people of Poland could be questioned. Does that mean that we were wrong to have resisted Hitler? From the perspective of all people subjugated and murdered by the Nazis, it was some considerable time before the Allies' support for them expressed itself in meaningful ground troop offensives.
Likewise with Kosovo. We should understand that it is impossible to prevent in the short term any sovereign power for persecuting, expelling and massacring any minority within its borders If then war is waged against the power from outside, then it is in pursuance of a better future. Unfortunately the present and immediate past are both unalterable.