While I consider religion to be almost completely irrelevant (except for how it plays out politically). Subjective experiences are *opinions*. Unless they can be elevated to objective experiences, that is what they will remain.
It is my subjective experience that tomatoes are vile. That doesn't make it true that tomatoes are vile. It just means that my *opinion* is that they are vile and that I will avoid them.
Truth is a different matter. It is true that there is a sofa in my living room. Anyone that cares to do so can verify that. that is what makes it an objective fact.
You apparently prefer to see reality in a dualistic manner always. For myself, while my mind works in the same dualistic manner as yours' as appropriate, when involved in religious practice, the goal is to be one with the universe, ie.,total reality, which if realized, there is a state of total peace beyond understanding. The mind is not thinking in this state, so if no thinker, there is no observer, just non-dual reality.
Having said that, later, any memory that arises of being in that non-dualistc state is dualistic, ie., the personal mind/observer and the personal mind's memory of the mind's non-dualitic experience. The memory is dualistic, hence the saying, "He is says, does not know, he who knows, does not say."