Judge Not?
Did You Know That The Bible gives very specific instruction about our behaviour towards heretics and teachers of false doctrine.
 

MARK THEM AND AVOID THEM--"Now I beseech you, brethren, mark them which cause divisions and offenses contrary to the doctrine which ye have learned; and avoid them." (Romans 16:17)

SEPARATE YOURSELF FROM THEM--"Wherefore come out from among them, and be ye separate, saith the Lord, and touch not the unclean thing; and I will receive you," (2 Corinthians 6:17)

REBUKE THEM--"...rebuke them sharply, that they may be sound in the faith;" (Titus 1:13)

REJECT THEM--"A man that is an heretic after the first and second admonition reject;" (Titus 3:10)

WITHDRAW FROM THEM--"...we command you, brethren, in the name of our Lord Jesus Christ, that ye withdraw yourselves from every brother that walketh disorderly, and not after the tradition which he received of us." (2 Thessalonians 3:6)

TRY THEM--"Beloved, believe not every spirit, but try the spirits wheth I beseech you, brethren, mark them which cause divisions and offenses contrary to the doctrine which ye have learned; and avoid them." (Romans 16:17)

REPROVE THEM--"And have no fellowship with the unfruitful works of darkness, but rather reprove them." (Ephesians 5:11)

TURN AWAY FROM THEM--"Having a form of godliness, but denying the power thereof: from such turn away." (2 Timothy 3:5)

HAVE NO COMPANY WITH THEM--"And if any man obey not our word by this epistle, note that man, and have no company with him, that he may be ashamed." (2 Thessalonians 3:14)

RECEIVE THEM NOT--"If there come any unto you, and bring not this doctrine, receive him not into your house, neither bid him God speed: For he that biddeth him God speed is partaker of his evil deeds." (2 John 1:10-11) *

http://www.inplainsite.org/html/Page11_cults.html