Do you think IRA (or one of its forks like Real IRA, Continuity IRA or one IRA extremist supporter) might have been involved? Today US supreme court has ruled to give tapes containing testimony to Irish police: http://www.guardian.co.uk/uk/2013/apr/15/ira-tapes-police-su... .
This idea is completely inane. The Volunteers declared war against the England that was on their soil in 1916, that they would shift suddenly to a war against the U.S. is ridiculous. Also, purposefully killing civilians gathered en masse without warning is more along the lines of British Army terrorism (Bloody Sunday, Amritsar), not the Irish volunteers who give warnings and tend to attack military targets, back when…
Take your biased ignorance elsewhere please.