"Immigrants Are OK, Because We Can Exploit Them"
From a pragmatic perspective, it's a step in the right direction insofar as it stymies attempts to restrict immigration. After all, immigrants' own behavior is a pretty clear indication that if given the choice between crappy working conditions in the US and returning home, they'll take the former. But immigrants' acceptance of those poor working conditions shouldn't become the justification for allowing them to enter and stay in the country. It says "Immigrants are OK, because we can exploit them."
Indeed, it seems that any viewpoint that would claim to be pro-immigrant (rather than just pro-immigration) has to oppose those poor working conditions. At a bare minimum, it has to oppose the way that fear of deportation undercuts immigrants' ability to access the basic protections provided to citizens. Freedom from sexual harassment and poison fumes (for example) are human rights, not special privileges of citizenship.