2 Corinthians 11:3-4, 13-15

But I fear that somehow your pure and undivided devotion to Christ will be corrupted, just as Eve was deceived by the cunning ways of the serpent. You happily put up with whatever anyone tells you, even if they preach a different Jesus than the one we preach, or a different kind of Spirit than the one you received, or a different kind of gospel than the one you believed.

These people are false apostles. They are deceitful workers who disguise themselves as apostles of Christ. But I am not surprised! Even Satan disguises himself as an angel of light. So it is no wonder that his servants also disguise themselves as servants of righteousness. In the end they will get the punishment their wicked deeds deserve.