For there are Corrupters who Say they Believe in God, but they are Not Believers, Rather, they are Mockers who Pretend to Preach in Order to Deceive those who Believe
And Thus, there are those who Say they are Jews, but they are Not, and there are those who Say they are Christian Apostles, but they are Not, and there are those Muslim Imams who Say they Believe in Allah, but Rather, they are with Satan
2:14 - 15, Qur'an
[For] when they meet those who believe, they say, "We believe." But when they are alone with their devils, they say, "Indeed, we are with you; we were only mockers." But God mocks them, and prolongs them in their transgression [while] they wander blindly.
2:11 - 12, Qur'an
And when it is said to them, "Do not cause corruption on the earth," they say, "We are only reformers." Unquestionably, it is they who are the corrupters, but they do not perceive.