Why brothers and sisters should not marry

I know the National Front is basically made up of morons, but their stupidity dropped to unimagined depths this week when their leader, Kyle Chapman, claimed that he was unaware that people in a photo with him were doing nazi salutes.

He also claims not to have noticed the swastika one of his colleagues was wearing.

I am sure they must be the results of in-breeding. Either that or our education system really does have a lot to answer for.