But it is the ultra liberals in this country that opened it up to immigration from the 3rd world
I think the main culprits are just hard-nosed pragmatic politicians of both parties--the Dems because thay believe recent immigrants vote Democratic; the GOP because their corporate sponsors want plenty of cheap labor.
If you research the history of U.S. Immigration law and the groups lobbying Congress to effect the changes which culminated in the 1965 Act and used the term, back in the 1940s and onward, "Diversity is Our Strength" and the rest of the PC jive you will see the ADL is merely continuing a tradition. ADL's Policy Outlook: The Bush Administration and the 107th Congress, Immigration and Refugees