How did many US labor unions treat Chinese immigrants in the 1800's

Badly the treat them horrible

First, socialists are always assumed to be on the left, while all anti-socialists are by definition right-wing. Second, the left always embraces the liberal values of equal rights, regardless of race, ethnicity, and nationality, while the "right-wing" anti-socialists are insular and xenophobic. Third, labor is always and forever on the left and capitalists on the right