"Maybe it's not too late"..."and forget how to hate"

Lyrics from "Crazy Train" by Ozzy Osbourne, "Maybe it's not too late.  To learn how to love.  And forget how to hate." 
     Although I attended a Catholic school from Kindergarten to 8th grade, I am not a religious person.  But I just feel there is too much "hate" in the world.  This is why I am teaching my 6 year old that "hate" (and "stupid") are words we do not say.  It's OK to not like something, but hate is a pretty strong word and I really wish people, especially kids, would stop using it to describe their feelings toward something or worse, someone. 
     The same goes for the word "stupid".  When did calling an inanimate object, like your cell phone or computer "stupid" when it is not performing the way you want it to.