Don't get logical..it's not in the Tancredo talking points.
"Open borders" can also mean encouraging illegals to come here, expressing concern for their "plight" as opposed to concern for the destruction they wreak on our neighborhoods, schools, hospitals, etc., cooperating with the corrupt Mexican elite to help them sneak in as easily as possible, not enforcing current immigration laws, rewarding illegals with a "path to citizenship," and thereby encouraging much more illegal immigration, and on and on.