In everyone's family tree, you will find princes and paupers, clergymen and criminals.
First, I am NOT Irish CATHOLIC. Second, I don't recall other European immigrants treated as poorly as the Irish.
But I will grant you that the Irish were not slaves in America (like Africans), nor were they almost annihilated (as was the American Indian), nor were they treated as poorly as the asians (as were the chinese).
One thing the USA did do was to give us all the opportunity to be make a boatload of money. And money buys politicians HAHAHAHA. That's why we are not the same.