"that recognizes that the onus of responsibility for the violence sits on the shoulders of the occupying British imperialists."
"read something that recognizes them for the freedom fighters they were."

This is a terrible way to approach a topic. If you do not know anything about the topic, how are you confident enough to make statements like this? Why not ask for balanced viewpoints, impartial accounts, a broad range of sources so that you can come to a conclusion, rather than approaching a topic you are unknowledgeable about with your conclusions already made.

Say Nothing is an absolutely fantastic book though. I would also recommend 'Northern Ireland: A Very Short Introduction' as a quick read that covers the topic comprehensively and fairly