In 1840 Ireland had a population of 8m and England had a population of 16m. In 2001 Ireland had a population of 6.3m and England had a population of 54m. Now considering the Irish loved to have about 10 kids and there's no sign of them in Ireland - I think it's fair to say about half of England has some Irish genes in there somewhere.
They only hate us because we invaded their countries, murdered their people and enslaved those left. You'd think we'd done something wrong.