I do not agree that most Pentecostals believe that you have to speak in tongues in order to be saved. Out of all the Pentecostals that I have met in my life I have only met one who believed that you had to speak in tongues in order to be saved and he was in a Pentecostal cult. Praise the Lord, many were praying for him. He finally came to the truth of it all and got out of the cult.