I believe that is the whole point of the song "Imagine". Probably, they had those images prior to the start of the war, and I don't think the war should make it any different. "Imagine" is a song of peace. But just because someone wishes for peace does not mean they do not support their country and the armed services in time of war. Apparently, there were no deroggatory remarks concerning our president, the troops or the British Prime Minister. Is there anything wrong with imagining and wishing for a world without war?