Watchtower November 15, 1963 p.688 Execution of Divine Judgment upon False Religion
3 Can there be false religion? It is not a form of religious persecution for anyone to say and to show that another religion is false. It is not religious persecution for an informed person to expose publicly a certain religion as being false, thus allowing persons to see the difference between false religion and true religion.
The Truth That Leads to Eternal Life 1968 p.13 Why It Is Wise to Examine Your Religion
Jesus reproved those persons who claimed to serve God but who relied heavily on the traditions of men in preference to God's Word. He applied to them God's own words from Isaiah 29:13, saying: "It is in vain that they keep worshiping me, because they teach commands of men as doctrines." (Matthew 15:9) Since we do not want our worship to be in vain, it is important for each one of us to examine his religion.
5 We need to examine, not only what we personally believe, but also what is taught by any religious organization with which we may be associated. Are its teachings in full harmony with God's Word, or are they based on the traditions of men? If we are lovers of the truth, there is nothing to fear from such an examination. It should be the sincere desire of every one of us to learn what God's will is for us, and then to do it.-John 8:32.