Religion is Unwarranted Faith and Belief
The problem with religion is unwarranted faith and belief. The problem of faith is as an invalid justification and the belief problem is holding unjustified false belief believing it is justified true belief. In epistemology, there is justified true belief, however, there is no justified true faith. Faith is what they try to use to skip the need for justification or to use faith as the justification for belief. So we must remove faith as it is not justified for the truth of anything and the problem left is belief. However the belief we can solve for some willing to reason by teaching others what is and what is not a justified true belief.