Mainland European powers have spent half a millennium doing everything they can to thwart English attempts unify the British Isles under one flag. The thought of England not perpetually a having nation-breaking catastophe on its doorstep horrifies the European powers to the point that have never, ever allowed it to happen.

It's something the United States joined in as soon as it had the opportunity - and despite pretenses of close friendship, the US continues to stab at England via Ireland to this very day.