What genocide?
If there were anything close to that, it was fomented by the Irish absentee landowners, who were the initiators of rack-renting and insisted on all non-potato crops as rent; not to mention the leftists in Ireland who exploited things for political gain and helped throw society into confusion.
So a million died in six years because of the moral evil of the selfish, perverse and turbulent character of the people? Ok - if you say so.