often times ve seen christians argue with one another sometimes catholics and jehovah's witnesses,redeemer and christ embassy and the list goes on they argue either about doctrines or over which church is better some even go as far as not allowing marriages because of church.even as worse as the Nigerian Police is they dont argue with themselves because they are one.well am not too suprised because the Glorious QUR'AN also confirms it in Chapter 2 vs 140 'yet if thou should bring to those that have been given the book every sign they will not follow thy direction;thou re not a follower of their direction neither re they followers of one anothers direction.