Why would the Jewish Anti-Defamation League interested in overturning

[BaruchHeObamawitz]

Arizona Law against illegal immigration? What does a Jewish advocacy group, whose mission statement includes looking out for Jews primarily, be jumping into the fight to overturn laws that the people of Arizona want?

http://www.jta.org/news/article/2010/06/24/2739753/adl-joins-arizona-lawsuit