ANSWER:

There is a difference between having intrusive thoughts that are blocked and ignored and between being doubtful whether Islam is true or not and whether Allah exists or not! This later is disbelief as one is not truly Muslim if he lacks certainty about Allah, Islam and the prophet salla allahu alaihi wa sallam. This is why the three questions in the grave will revolve around these three issues and if one is not certain, he will fail to answer!

QUESTION: I heard in a hadith that if you have doubts in Islam, you will die as a disbeliever. I have a question: If a Muslim has doubts, what is their mistake? Why would they burn in hell forever if they did not reject the truth? and if they have not seen the proof