Amen again. If the Lord immediately cut off anyone who ever preached any variation on His gospel, He would have immediately excised Peter when he wouldn't eat with the gentiles. But God knows a man's heart, and He'll take an ounce of submission over a ton of sacrifice. If someone is committed to Him, and even slightly off in doctrine, the Lord can bring him around.
Criticism is the world's way...we are in the world but not of the world!!!