The story of the Irish immigrants in America laid out at New York’s Tenement Museum

While reading this article I was reminded of St. Brigid's Church build by Irish Famine immigrants in the Lower Eastside, and how close it came to being demolished a few years ago on orders from the Cardinal. Irish children who survived the Great Hunger emigrated in large numbers in the early 1860s and an estimated 63,000 joined the Union Army unon arrival in NYC. Those young Irishmen died by their thousands in a war that reuntited the dived American nation and abolished slavery. Why is it so very difficult for today's young educated, highly skilled Irish immigrants to obtain permanet visas in the country to which previous from their their nation have contributed so very much???