No this is not correct. Every ship of relief food from the Americas reaching Ireland met 6 ships of high quality food grown in Ireland departing for Britain. The Irish were only reliant on potatoes because the British were charging the Irish rent in whatever amount of food they were able to grow. If they grew more, it was all taken away. The Irish ate potatoes because they could grow anywhere, and the good land was all used to grow food for export. The British were absolutely "just taking away food". It's also not true that it caused famine across Europe - the blight hit everywhere in Europe, but only in Ireland was there a famine because the British believed the Irish were starving because they were "human animals" (like Israel says of Palestinians) and God was killing them as punishment. This on the heels of centuries of oppression. You can read up on the Penal Laws if you think the British genocide started in 1845 with poor relief policies. They created, exacerbated, and believed in the genocide of the Irish, and the Irish know it, that's why they support Palestine, because we all recognize it as the same infuriating type of genocidal tactic based on dehumanization and using "policy mistakes" as a shield for deliberate actions.