Arguments that undocumented farmworkers deserve what they get are what prop up neoliberal and neoconservative policies. They further institutionalized racism to divide and conquer us and whatever nation or boogie-man on which we want to drop bombs. Human beings are human beings wherever they are. Our Constitution (flawed as it is) would not have passed without the addition of the Bill of Rights and its protections, and does not differentiate citizenship, except in voting and running for federal office. In this respect it embodies the Golden Rule, which should be a good enough reason to support farmworkers.
Borders box people in, and they box people out, while jobs and money move freely across them. In the case of farmworkers in New York and all over this country, if it weren't for them, a lot of the rest of us would be very hungry. They deserve at least basic labor and health protections.
Please see: Driscoll's Workers Call for Global Boycott over Alleged Abuses at World's Biggest Berry Distributor and Familias Unidas por la Justicia