I have no doubt they were sincere -- but I hope you won't be misled by this, because sincerity alone is not enough. Have you ever taken an unfamiliar road and sincerely believed you were going the right way -- only to discover later that you actually were going the wrong way?
The reason this group requires its members to read only its "translation" of the Bible is because their beliefs do not come from the actual Bible and are not supported by it. Only by mistranslating the Bible and twisting its clear meaning can they defend their teachings. For over 2,000 years Christians have studied the Bible and affirmed its teachings -- but this group rejects them.
The real issue, however, is this: Who is Jesus Christ? Is He the divine Son of God, sent from heaven to save us from our sins by His death on the cross and His resurrection from the dead -- as the Bible teaches? Or is He less than this, as cults claim? The Bible says, "He is the image of the invisible God.... for God was pleased to have all his fullness dwell in him" (Colossians 1:15,19).
Don't be misled, but turn to Jesus Christ and open your heart and life to Him. Only He can forgive your sins, and only He can give you new life. Then seek out a church where the Bible is taught and preached so you can grow closer to Christ.