The Bible is clear that servants of Christ can be in the truth. Jesus IS the truth, and his servants are in him. However, Jesus is NOT a religion or a religion's dogma.
If that were the case then, the entire New testament of the bible is null and void. It is quite clear in those books, that After Jesus, the CHRISTIAN Congregation was started. Based on Christ teachings the Congregation ran. The truth of Jesus was manifested through the teachings (dogma) through the newly formed Religion, which was refered to as the WAY!