Hindus and Jews are protected in this country under race discrimination legislation, as they are recognised as distinct races. Homosexual people should also be protected as - and I'll say it again - sexual orientation is not a matter of choice.
Catholicism, Islam, Astrology, Scientology are all things one chooses to believe in, and not something you are born with.
Why should Catholics be immune from ridicule whilst David Icke isn't? Just because there are more of them? Believing that the world is run by a race of alien lizards, or that we are decended from Thetans doesn't seem any more daft to me than transubstantiation or the concept of original sin. It's all a load of bollocks.