In May 2008, Immigration and Customs Enforcement raided the Agriprocessors kosher meat factory in Postville, Iowa. As with other raids, much gnashing of teeth from the left and/or those who support illegal activity for financial reasons ensued.
However, this time it was a bit muted due to the fact that the owners of the plant - the Rubashkins - don't exactly appear that sympathetic. For instance, they were subsequently charged with 9000 child labor law violations.
Even the most crooked far-leftie is going to have trouble defending that, but that hasn't stopped a few from trying. Note that the only way to have prevented the abuses at Agriprocessors would have been to enforce our laws - labor and immigration - across the board. Anything less would have allowed those abuses to continue. Thus, those who decry those abuses while at the same time not supporting enforcement of our immigration laws are either corrupt or stupid, or both.