Muslim society is based on purity of feeling, love, sincerity towards every Muslim, and fulfillment of promises to every member of society. Its members are endowed with piety, truthfulness, and faithfulness. Cheating and deception are alien characters in contrast to the noble character of a true Muslim. There is no room in it for swindlers, double crossers, tricksters, or traitors.
Prophet Muhammad said: Every traitor will have a banner on the Day of Resurrection and it will be said: This is the betrayer of so-and-so.” (Saheeh AlBukhari)