Reply To: Rav Chaim: A Nebach Apikorus is also an Apikorus

I can go into this at length, but basically the Rambam holds that Olam Habah is a continuation of the amount of understanding of G-d that you earned in this world. Thus, someone with false ideas about G-d inherently does not receive this, whether or not it’s his fault. Because if you have false ideas, there is inherently nothing for you to receive in Olam Habah. Pashtus is that we hold by the Ra’avad in this.