Well fsuck you. Niggardly has fine Northern European roots and I use it when appropriate. As in referring to your evident niggardly education and up-bringing.
If we can't use "homicide," what word would you suggest we use to mean "one person kills another person"?
You are correct niggardly is a perfeclty inoffensive word but some ignorant folk think those who use it are saying something else. Much like your hystrionics over the word homicide which was used correctly in this story.