Quite possibly, this is the cruelest thing that you could do to someone. Particularly when you don't understand it or only know part of the truth (at best), anyway. Let people live; let people learn. (Those are not my words but well said.
I think 99 times and find nothing. I stop thinking, swim in silence, and the truth comes to me. - Albert Einstein, Einstein developed the theory of relativity, one of the two pillars of modern physics.