Is the idea of "the obsessive reaching the faith of a normal person" a valid means of treating OCD, by disregarding what remains of the faith that he believes he must attain?

The cure for intrusive thoughts (waswasah) is complete disengagement from them, occupying oneself, and not giving in to Satan. This is what Ibn Taymiyyah, Ibn 'Abd al-Salam, al-Haytami, and others have stated, and it has been proven to be the effective remedy.