I find HN to be one of the more moderate, centrist, pro-business places I get my news. There are vocal left-of-center members, but I'd hardly call it a left-of-center place. We clearly want to create an environment where entrepreneurialism and technology work to make the world a better place, and admire successful people and companies that make that a reality.
But I bet if you suggested ruthlessly deporting anyone who overstays a student visa or cheats on their visa to do a startup, you'd get a different response, even though those things are just as illegal as the person working at Wal-Mart without legal presence/permission to work.