God says
And when they are told, “Do not spread corruption on earth,” they answer, “We are but improving things!” Oh, verily, it is they, they who are spreading corruption– but they perceive it not!* -- Q.2: 11,12
* It would seem that this is an allusion to people who oppose any “intrusion” of religious considerations into the realm of practical affairs, and thus – often unwittingly, thinking that they are “but improving things” – contribute to the moral and social confusion referred to in the subsequent verse.
Do not abuse those (beings) whom they invoke instead of God, lest they abuse God out of spite, and in ignorance: …. Q.6: 108
. … and do not [allow yourself to] be at variance with one another, lest you lose heart and your moral strength desert you. And be patient in adversity: for God is with those who are patient in adversity -- Q.8: 46
Prophet said
1. “To God, the worst of men in rank on the resurrection day will be one whom people give up for fear of his harms”-- H: Bukhari and Muslim. N: Bibi Ayesha.
2. “He does not believe in God (said three times): he from whose injuries his neighbour is not safe”-- H: Bukhari and Muslim. N: Abu Hurairah.
3. “One who creates dissension shall not enter paradise”--H: Bukhari, Muslim. N: Huzaifah.
4. “Doors of paradise are opened on Monday and Thursday when every servant (of God) who does not ascribe divinity to aught beside God is forgiven except a man between whom and his brother there is rancour. It is then said to leave them alone till they are at peace.” – H: Muslim. N: Abu Hurairah.