Smokey,

Give me an example of one person telling another that they are delusional where it is not derogatory?

Surely no one thought that I was saying that Shaw should be locked up for being loony or insane. Yet, in a thread where Christians as a group were being called delusional, a few of you complained that I was going too far.

Yes Dawkins knew what he was doing when he chose that word. He was being deliberately insulting and picking a fight. He was saying that that to be a follower of a theist religion is to be mentally ill and that is as far as I can see is the theme of the book.