SAN DIEGO — Justice Sonia Sotomayor has injudiciously reignited the conversation over words used in the immigration debate just when the prospects for immigration reform in Congress are holding on by a thread. Let’s focus on what’s important. Lawmakers need to find the courage and common sense to break the impasse over immigration in a way that secures the border, provides businesses with workers, makes it easier for immigrants to come here legally and gives the estimated 11 million illegal immigrants in the United States an earned path to legal status with or without citizenship.