Go away and read and Cecil Woodham Smith's wonderful book, 'The Great Hunger: Ireland 1845-49', published in 1962. She was pretty much the first to question the idea (which was then predominant among Irish historians) that Britain was not accountable for the Irish famine.
Woodham Smith was a revisionist. You still clearly do not understand what the term means.
I'm not going to bother with you any more.