If you celebrated the execution then you are indeed a knuckledragger. I can't speak for the rest of your family but I can guess that if your niece is schooled in a public environment she won't be shocked at all.
Effin' right I celebrated, not becuase I enjoy the death of any man, woman or child, but because one of the most ruthless despicable sunuvabich ever whelped into mankind was thrown out the door thru a newly created justice system for all the deaths he had caused and (IMO) was continuing to cause. While you may have wept at his execution, perhaps you can find joy in that he is no longer among the living.