From a certain point of view maybe, but the truth with history is that it is a lot more complicated than what one side usually lets on. From the British perspective, the IRA are terrorists, after all, they revolted against British rule in Ireland. The problem with only looking at a British perspective is that you ignore the perspective of the Irish as well as the international community. For the Irish, the IRA are freedom fighters who stood up against British oppression, similarly to how the US views their own revolution against the British, and liberated most of their island. Both sides have certainly committed their fair share of atrocities, and no side is truly innocent, but it is a lot more complicated than just one person saying one group are terrorists. In order to truly understand history, one must study all its aspects, not just the narrow view of one side of a conflict. I won't tell you what you must think about a certain topic, I think it's important that you study the topic yourself and come to your own conclusions. I'll leave some links for you and anyone else interested in researching this topic yourself.
https://en.wikipedia.org/wiki/Irish_War_of_Independence
https://www.irishtimes.com/culture/the-irish-war-of-independence-as-seen-by-the-international-press-1.4193775
https://winstonchurchill.org/publications/finest-hour/finest-hour-143/why-ireland-won-the-war-from-the-irish-side/
https://www.nytimes.com/2019/01/21/opinion/how-the-irish-won-their-freedom.html
https://www.nationalarchives.gov.uk/cabinetpapers/themes/nationalism-war-independence.htm