What should one do who suffers from satanic whispers that make him doubt the Islamic religion and suggest that the اختلاف (disagreement) of scholars regarding an issue indicates the falsehood of that issue?

Whoever experiences some whispers (waswas) should say: "I believe in Allah." A Muslim is not held accountable for the whispers of Satan and self-talk unless he utters them or acts upon them. The cure for waswas is to believe that it is a satanic thought and to fight against it, diverting one's mind from it by occupying oneself with beneficial knowledge, righteous deeds, sports, or permissible recreation, and by avoiding solitude.