Is it Betrayal to Turn the Terrorists in to the Authorities

Is it Betrayal to Turn the Terrorists in to the Authorities?1

Question: Honorable Shaykh, some of the youth come sometimes and ask about this issue: if I find someone who defends these people (the Khawaarij, terrorists, etc.) and their plots, should I turn them in and inform (the authorities) of them? Some people consider this to be a form of betrayal on the part of the authorities, and that it’s impermissible to do this. We hope your eminence will explain this.

Answer: The prophet sallallaahu ’alayhi wa sallam said:
“The religion is sincerity (giving sincere advice).”
He repeated this three times. We (the companions) asked, “To whom, messenger of Allaah?” He answered:

“To Allaah, His book, His messenger, to the leaders of the Muslims and their common people.”2
So, anyone who falls into these issues, he should be sincerely advised and explained the reality of these matters. If he desists, then thanks are due to Allaah. If he doesn’t desist yet he keeps quiet and doesn’t actually do anything, then leave him – his sin is upon himself. But if he actually and outwardly does something to deceive other Muslims or always talks about it, spreading this filthy ideology, then it’s an obligation to turn him in. This is a part of being sincere to Allaah, His book, His messenger, to the Muslim leaders and the common people.

1 This question was answered by Sh. Saalih Al-Fawzaan verbally and the audio clip can be found at: This particular audio clip is no. 20 in the list and contains three questions answered by the Shaykh; this is the third o
2 Recorded by Muslim (no. 55).

English source of it