HELP! Should I Tag NSFW for Offensive Symbols in My Comic?

@EbonyKaze JosieJ.E.S.
Thu, 30 Oct 2014 18:50:39 +0000

In my next page a plan to introduce some characters that are self-proclaimed witches(They are actually very talented scientists) but they wear upside down crosses as a fashion symbol,i know some think its satanic but its also St.Peter's cross isn't it? Do you think anyone would find that offensive? Should i tag it NSFW?
Thanks for your help in advance:)!