Op-Ed: In the 1920s, when my Canadian-born Irish Catholic grandfather (Bruce Arthur McGuigan) came to Chicago to find work, scattered shop windows still bore signs instructing, “No Irish need apply.” In discussions about immigration, I often ask fellow conservatives: What if you were a Mexican with a wife and children, willing and able to work hard, living in Mexico today with its drug wars and social chaos and collapsing culture? If you sought a better life for those you love, what would you do? Would you stay Mexico, or find a way to get to America?