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.
Life asked Death, Why do people love me, but hate you? Death responded, Because you are a beautiful lie, and I'm a painful truth. A truth we must all face. So why be afraid of it? Live life fully cause we never know today may be the last