You are quite free to believe such a stupid equation, E=Mc^2. But you have to reconsider if you are going to teach younger generations of science students who are eager to know what is the atomic nuclear energy.
If you explain atomic fission and fusion energy you have to utiize this same stupid equation E=mc^2. However, according to current physics, atomic fission and fusion are philosopically opposit reaction, right???. But both reactions are exothermic. It is not a science but a comics. Yoon explains both nuclear reactions with atomic electron rings and nuclear electron rings without violating any natural law, unlike your particle physicists do. Newedana