Questioning if Immigration is worth the fight

Turning on the news, I am instantly overwhelmed by the many problems that the government faces with immigration. Would it best to build a fence along the southern border of the United States? Is that even reasonable to spend that amount of money when illegal immigrants will continue to come into Texas, New Mexico, and Arizona? Should the federal government be really concerned with illegal immigration? Are people in Arizona overreacting to the whole situation? Is our economy suffering because illegal immigrants staying in the U.S. after their green card has expired? Our country began with immigrants, mainly from Europe, but do we want to stop allowing Mexicans into the country. No! That is not the problem at all. We want them to be here, but just legally. Ok now the issue turns to what the requirements of an immigrant to be a citizen should be.