In the realm of truth, the belief system has no place. The birth, life and death itself is mere illusion on the ultimate standpoint. Therefore, the reincarnation, resurrection and rebirth theories are mere intellectual speculation. For one who is aware of the fact that, the self is not physical but formless Spirit, for him the question of being Christen, Hindu, Jew or Muslim does not arise.
The man who is aware of the truth, for him, the intellectuality is mere speculation or imagination on the base of physical self within the illusion.
Until one remains stagnant with his accumulate knowledge as truth, he will not be ready to verify anything other then his accepted truth, because he is in the clutches of his physical based/egocentric truth/knowledge.