Apparently, according to an article I've just read in the Guardian (so it's all true), the fact that so many people become more bigoted as they get older is because of the degradation of the frontal lobe of the brain that comes with age. This is the part of the brain that is responsible for stopping you saying things you shouldn't really say in public unless you are a Sun journalist. This means that those people who condemn Prince Phillip mercilessly every time he says something inappropriate about "Johnny Foreigner" are having a go at an elderly person suffering from a degenerative neurological condition.
I ask you, how non-pc is that?!!!