The reason is that a military defeat of Britain will bring about the disintegration of the British Empire. This would not be of any benefit to Germany.
“I try to exist in a world where there is freedom of opinion, where you're allowed to make jokes. I don't want to live in some PC world where no-one's allowed to say anything.”
“I don't display my plaques and honors. They are hidden behind a black curtain in my work room at home.”