Your impression of Tancredo is one to be expected of liberals and the WSJournal/Bush wing of the GOP.
First of all, opposing all immigration is a perfectly legitimate position, and much preferable in my opinion to unending mass illegal and legal immigration.
But in point of fact Tancredo does not want to end all legal immigration. While in Congress he sponsored bills that would have greatly reduced legal immigration (as we should), but still allow upwards of 300,000 legal immigrants per year. Only in the mind of pro-unending mass immigration zealots like you does that represent a xenophobic or extreme position.
Your preferred policy of mass legal immigration will demographically destroy conservatism and any hope of smaller and more limited government. Most Hispanics hold liberal views on most of the big issues. The same is true of most other immigrant groups too.
In the 2008 Republican Presidential nomination debate he said he wanted all immigration stopped (including legal). That is a crazy position. You can’t deny it is a crazy position.