I'm not a fan of if (or the 'have you ever seen Germany win a war' chant that was also going last night) for a few reasons. Including being factually incorrect. The RAF was not of England, it was of the UK- something which I wish we sang about more instead of the individual nations within it. The song is also about Nazi Germany, technically a different country to the one it's sung to the people of (in the same way as the French 2nd republic was different to the 3rd), a small difference I know. The 'have you ever seen Germany win a war' song is also factually incorrect, because if we're using the scope of general Germanic governance to comprise any form of German nationhood, then they won the Franco-Prussian war not too long before the First World War (in which they pretty much beat the Russians and almost beat us). Also I think it's crude, inflammatory and unnecessary to sing about killing anyone's possible grandparents or great-grandparents, on both sides. But that's just me.