As Jesus prayed for His disciples in John, He asked that “they may be one as we are one.” (John 17:11)  Later in that Chapter as He went on to pray for all Believers, He said, “May they be brought to complete unity to let the world know that You sent Me and have loved them even as You have loved Me.”  (John 17:23)  In other words, to reflect the unity and oneness between the Father and Son,  as Believers, we need to be perfectly united also.  You can’t   show the world Jesus when your bad behavior towards others is just like the rest of the world.