Sometimes one hears the argument that go along the lines of "we didn't fight a war with Germany only to let them take over by stealth afterwards". It's a cheap and bad form of argument, in my view.
No doubt there's a sadness in thinking of someone who had in mind the green and pleasant land of their childhood as inspiration for fighting the war, only to see it built over the moment he returned home, but it's no more than that - an emotion.
Let's say that Ted Heath fought the war - and worked throughout the peace - to bring out a more united Europe. Even so, we owe him nothing.