Being a Christian has nothing to do with what you do. It has to do with what Jesus did. You can do all you want but it will make no difference in the end. It' Jesus who saved you and you must just believe that. If anyone tells you something different, that you need to do something more, you need to mistrust some of the things that he' telling you. The things that other people say and do does not make them a better Christian than you. Knowing that Jesus died for your sins and rose from the dead makes you a Christian. All they did, and all you need to do, is that simple fact: believe that Jesus died for their sins and rose again.