America is based on immigration, almost everyone who is here immigrated here at some point. At every point in America’s history though some people have opposed immigration (and generally not been that successful). Almost every nation & race has had people try to prevent their entry: the Irish, Catholics, Italians, Greeks, Africans, Chinese and so on.
Our country is based on the idea of allowing people to come here and work their ass off to get ahead. It is not based on protectionism (“they’re stealing my job!”).
Give everyone who is not a rapist or other convicted criminal free entry to our country. Do not give them free medical care or education. Do give them the opportunity to open their own businesses and make their way ahead in the world.
Arizona & Texas’s attempts to block immigration should be shunned as the blatant racism and anti-capitalism that it is.
Every human being deserves a chance to forge a better world for themselves and their children.