I found it offensive. He seems to be a supporter of terrorism given the "her aggression towards our neighbours in Ireland" comment. For the younger readers the "neighbours in Ireland" are the ones that left 5 people dead and 31 injured in an attempt to assassinate Thatcher with a bomb.
I think Brand's referring to the collective punishment meted out to Nationalist communities (the indiscriminate shootings at events like Bloody Sunday, internment of hundreds on the flimsiest of suspicions etc.). and the - since admitted- state collusion that existed between police officers and soldiers and Loyalist killers.
That's just my take on it anyway. The truth can be offensive but ultimately very liberating.