>>I've often wondered myself why the sinking of an ocean liner nearly 100 years ago could have caused so much acrimony among people who study it for a hobby.<<
Because people are people and they don't always get along. If they did, there would no need for courts, cops, the military, or forum moderators.
Beyond this much, all I can or even will say is that the public forum is really not the place for the discussion of such matters. What people discuss off list, whether by e-mail, private or instant messenger services is...of course...their own affair, but please keep it off list.