It would be like trying to explain consciousness to animals. We as humans know who we are and are aware about ourselves and others this is what separates us from animals. Even if we could somehow communicate with animals it would be nearly impossible to explain our feeling of consciousness to them. It would be like an alien who travelled to earth trying to explain faster than light speed travel to us. It would be too much for us to handle. Instead of trying to find the one true answer to reality everyone should have their own concept of reality and what they believe. We already have examples of this today. .
We have atheists, Christians, Jews, Muslims, Hindus, and more that all have their own concept of reality. But all of them try to force their concepts on others. None can just accept that some people have different views. Personally I am a Christian mostly because I asked myself if I were to die right now I would like to believe in something that would help me in the afterlife. If I died and God asked me why he should let me into heaven being an atheist wouldn't help my case. With me being a Christian though I still acknowledge that we try to put our views on other people too. .
Just because people affiliate with a different group doesnt mean they have the same concept of reality as them. Even though I associate myself as a Christian I wouldnt consider my concept of reality the same as theirs, we just share common main ideas of reality. Just as Americans share things about reality that other people in different countries dont. For example we believe we landed on the moon while people in other countries might think it is a hoax for fame. The area we grow up in, our parents, and even things such as what we look like can affect our ideas of reality. What I know to be an illusion can be someone elses entire reality. .
The people in North Korea live in an illusion to us but to them it is their reality.