Hate-inspired novels

Lindsey writes “”The Turner Diaries didn’t just inspire a lot of extremist violence — it also inspired a lot of extremely violent novels.” Read the article by Camille Jackson on the Southern Poverty Law Center’s website:
http://www.splcenter.org/intel/intelreport/article .jsp?aid=490
As librarians, should we include these books in our collections? If we do, can we defend our choice to potentially outraged patrons? If we don’t, are we censoring? Would we purchase them if we live in a community with diversity problems? Are they indefensible in a library collection?”