This is true and it works both ways... They hold to heart both the negative and the positive things that you tell them. If I ever have children I'm going to think about this more.
That is evil but I don't know that children commit suicide for name calling, there might be more to it than that like s-xual or physical abuse but yes its bad to call anyone names really.
This isn't always the parent it could be their own friends or other children their age. I bet most of us can remember being called names at some point of our lives growing up.
Parents can inflict emotional harm, not realize it
"Psychological maltreatment is just as harmful as other types of maltreatment," says today's report in Pediatrics. Yet it is not recognized, understood or studied as much as physical or s-xual abuse, says a team of authors that includes members of the American Association of Child and Adolescent Psychiatry. Ref. Source 3