What "diversity" should mean, but alas, does not

C.S. Lewis on healthy patriotism:

Of course patriotism of this kind is not in the least aggressive. It only asks to be let alone. It becomes militant only to protect what it loves. In any mind which has a pennyworth of imagination it produces a good attitude towards foreigners. How can I love my home without coming to realise that other men, no less rightly, love theirs? Once you have realised that the Frenchmen like cafe complet just as we like bacon and eggs-- why, good luck to them and let them have it. The last thing we want is to make everywhere else just like our own home. It would not be home unless it were different.