List Of Sura's

And when it is said to them, “”Do not cause corruption in the earth,”” they say, “”We are but reformers.””

These Hypocrites used to behave like Muslims and when they were in their company they used to assure them that they were Muslims but when they went back to the non-believers they used to assure them too that they were with them. In fact, by their not believing in Allah and the here after the hypocrites were with the non-believers. This dual personality of the hypocrites was one of the causes of corruption, they used to spy for the non-believers. When they were made conscious of this corruption of theirs by the believers they again lied saying that they were reformers and when the non-believers objected to their moving with the believers they told them they were just mocking i.e. acting like Muslims and fooling them. It was probably in view of this assumption of theirs that when they were asked to believe they replied, “Should we believe as the fools believe?” But Allah (SWT) confirmed that they are the corrupt and they are the fools and by allowing them to blindly wander in their rebellion He himself is fooling them because they are presuming that what they are doing is right. Finally, He declares that theirs is a bad deal, they are purchasing error i.e. hell at the cost of guidance i.e. paradise. By not receiving guidance they have thus lost the deal.