There are two types of "Christians" in the churches today: (1) Those who profess to believe the Bible, yet only obey that which they want to obey based on personal preference, bias, convenience, etc.; and (2) those that believe the Bible and seek diligently to obey all that Jesus commanded. The group that picks and chooses what to obey and what not to obey must find like-minded pickers and choosers who pick and choose what they pick and choose--thus, you have many denominations/groups of like-minded pickers and choosers. It is terribly hard to get anyone to leave their group. The only way is to get them to pick and choose different things, or become one of the believers who just seek to obey all Jesus taught through his Word. This faith and practice will be the same as that which the apostles handed to the first century churches.