The article in Breitbart you linked refers to illegal immigrants, not 'proper' immigrants. If it makes me a xenophobe to want people who came here illegally to be ousted, then so be it. They can go through the same process that others do in order to come here. I could support simplifying the immigration process for everyone, but one group of people DO NOT deserve special treatment over others, period.
The poll from Pew Research shows that 52% of TEA Party supporters who vote 100% of the time support a path to citizenship for undocumented immigrants. That's not the same as being anti-immigration, in fact it shows a willingness on their part to forgive people for breaking the law to get here, and to welcome them into the community.
The article from Reason makes a good case - at least concerning O'Malley's position on the issue. I would support a simplification of our immigration laws. Legitimate citizens are more valuable to our country and our culture, and Latinos migrating here deserve better than being relegated to landscaping and cheap labor.