Both Christians and Muslims internalized the moral-contrast trope about their two faiths

Evidence

The idea of this contrast has been almost universally adopted, and the contrast may not be unacceptable to Muslims themselves, when it is not tendentiously worded. … It is not possible to exaggerate the horror that the clergy felt for a doctrine which, without admitting that it was contrary to reason to do so, either permitted or encouraged things that men in any case would not give up, only too often, ‘for any terrors or tortures or even for human shame, which for many is harder than death’. — Norman Daniel, Islam and the West, 1483