God tells us to correct and rebuke!...
2 Timothy 4:2-3
Preach the word! Be ready in season and out of season. Convince, rebuke, exhort, with all longsuffering and teaching. For the time will come when they will not endure sound doctrine, but according to their own desires, because they have itching ears, they will heap up for themselves teachers; and they will turn their ears away from the truth, and be turned aside to fables. But you be watchful in all things, endure afflictions, do the work of an evangelist, fulfill your ministry"
Religion is nothing more than various organizations invented by man.
There is only one way to follow God. Born again Christians/true followers of Christ do not belong to a religion. Religion is of man. True born again Christians are true followers of God, according to his word.
We are not to unite with those who follow false doctrines.
Correct doctrine is crucial because false and man-made doctrine drives out, replaces and nullifies true teaching (Mt. 15:1-9; Col. 2:8, 20-23)
Jeremiah 5:30-31: "An astonishing and horrible thing Has been committed in the land: The prophets prophesy falsely, And the priests rule by their own power; And My people love to have it so. But what will you do in the end?"
We cannot remain silent. We must beware of false prophets (Mt. 7:15). We must try the spirits to see whether they are of God (1 Jn. 4:1). We must sound the same trumpet that Christ sounded, “Take heed and beware of the leaven of the Pharisees and the Sadducees.”
To sit in silence is to ignore God's word. We are to share the truth to the blind; those who are blinded and actually have a relationship with religion and not with God.