There are people who think that?
Then again I've met people who think that Protestantism isn't related to Judaism.
As strange as it might seem, most Catholics don't know it. Virtually all Catholics consider themselves to be Christians. Obviously very very few have read the bible or have any real knowledge of their religion. It's the same with Christians too; very few have read the bible, which supposedly they base their lives upon. I've read Cogger cover to cover countless times!