Violence from the Republican "dissidents" has happened before, with several deaths (policemen, soldiers and others) and this week a "spectacular" bomb outside the courthouse in Londonderry (Derry to some). See:https://www.bbc.co.uk/news/uk-northern-ireland-46937061 and:https://thedefensepost.com/2019/01/1...thern-ireland/

Understandably as the author has been researching her book on the "dissidents" for years she has been busy and her book 'Unfinished Business – The Politics of ‘Dissident’ Irish Republicanism' is due out next month.

A "lurker" recommends the book. Here are a couple of sentences as a "taster":
The principle of consent was anathema – the onus remained on dissidents achieving unity by the Armalite (or Kalashnikov) rather than the ballot box.
They will say it could have succeeded if it were not for decisions taken by the leadership.
Link:https://www.irishtimes.com/news/irel...king-1.3770643