Maybe you don't understand the difference between legal aliens and illegal aliens. Cong. Tancredo's legislation allows legal aliens to come to the United States to work. The McCain-Kennedy amnesty proposal allows illegal aliens to earn citizenship. The Kyle-Cornyn amnesty plan and the Bush amnesty plan each give legal status to illegal aliens. Cong. Tancredo's plan does not give legal status to illegal aliens.
There is no list of "illegal aliens". All one would have to do is apply for a guest laborer visa while back in Mexico for Christmas holidays.
Even those who entered legally and stayed after their legal period expired are not on any list because CPB does not keep up with who exits the country.
Tancredo's followers are as much in denial as Buchanan's were. If Tancredo named a MS13 LaRaza leader as his VP his followers would probably reconcile it just like Buchanan's followers did when he named a communist leader.