When he sticks with the Bible he is very good. But when he gave his message on tongues via Youtube, I saw that he departed from what Paul said in 1 Corinthians, and gave a very negative picture of the Corinthian church, implying that its worship was more demonized than of the Holy Spirit and their use of the gift of tongues came directly from the worship of pagans around them.
Paul said no such thing, and his description of the Corinthians church is nothing like how Dr MacArthur described it. I heard enough to assure me that Dr MacArthur exaggerated the problems and demonized them to such a degree that showed me that he was speaking out of prejudice and not according to what Paul actually said in 1 Corinthians. I think Dr MacArthur left his common sense behind the door at home when he went and gave that teaching.
Dr MacArthur totally ignores this Scripture:
" I always thank my God for you because of his grace given you in Christ Jesus. 5 For in him you have been enriched in every way—with all kinds of speech and with all knowledge— 6 God thus confirming our testimony about Christ among you. 7 Therefore you do not lack any spiritual gift as you eagerly wait for our Lord Jesus Christ to be revealed. 8 He will also keep you firm to the end, so that you will be blameless on the day of our Lord Jesus Christ. 9 God is faithful, who has called you into fellowship with his Son, Jesus Christ our Lord" (1 Corinthians 1:4-9).
This is not the demonized, out of control church, participating in pagan ritual that Dr MacArthur is making out. Therefore, his teaching about the Corinthian church and its use of tongues is totally false and deceptive. Jesus warns about false teachers who spout stuff out of their own hearts instead of through the Holy Spirit.
It confirms what is written on a packet of rat poison. 99% good food for rats, but 1% poison to kill them. Most of what Dr McArthur teaches is good Bible teaching, but his 1% error about the gifts of the Spirit, the Corinthian church and the gift of tongues is pure poison and it kills the spirits of gullible people who trust his teaching stone dead!