“Woe unto you, scribes and Pharisees, hypocrites! for ye compass sea and land to make one proselyte, and when he is made, ye make him twofold more the child of hell than yourselves. “ (Matthew 23:15)
But Christians are to help those who are deceived by both moral or doctrinal sin,
“Brethren, if a man be overtaken in a fault, ye which are spiritual, restore such an one in the spirit of meekness; considering thyself, lest thou also be tempted. “ (Galatians 6:1)
Sometimes Christians are among the most gullible people on earth.