That's the fun thing about most religious folks. They pick and choose which parts of <HOLY BOOK> to follow. Not to pick on anyone in particular, but ever heard the term "Cafeteria Christianity"[0]? It seems that following the entirety of a religion would be rather hard unless you quickly dive into the sticky situation of saying which parts are valid and which are not.
Yeah, it's so hypocritical to only follow the words of Jesus Christ, and ignore all the older stuff that's contradicted or overridden by Jesus. Like they don't even know why their religion is called Leviticianity.
[0] - http://en.wikipedia.org/wiki/Cafeteria_Christianity