Although the US government have the responsability to look for a resolution to what remains a serious problem, I believe building a fence will send an extremelly damaging message concerning the will and the ability of the US to deal with the greatest challenges which lie ahead.
First of all, it will send the wrong message. One of fear and doubt. This will ressemble the situation during WWII when many japanese people where put behind fences just for beeing japanese. Now the US wants to use other fences to keep other people away. This will represent a victory for terrorism whose aim is not to cause damage per se but to force a change in behavior by introducing permanent fear in everyday’s life.
Second, another wrong message will be the one received by those who will see that fence built in front of them. A fence between them and some of their dreams. Most of the people who enter the US, and illegally stay, do so out of desire for a better life. Mexicans and latin americans, will feel humiliated and this is not the best way to collaborate and work together to address this problem. The real solution is to motivate people to stay in their countries. That’s where the US should concentrate its efforts.
Third, the fence will most certainly be a waste of money. Many of the illegall immigrants, if not most of them, enter the US through legal means, as the 9/11 terrorists did. The resources need to be used elsewhere.
A final though, for now,through effort and ingenuity, the US have succeded in creating a society that attracts many people from all over the world. One of US’s success factors has been its demonstrated capacity to integrate these people. A growing population is still a strong motivation for economic growth. Moreover, the US still endeavors to attract the best people in many areas, with the consequence that quite often the very people who could help improve the situation in developing countries already live, legaly, in the US. Instead of building fences to block those deem unworthy of coming to the US, why not have the will and imagine ways to motivate the bright people to go back to their countries to help improve the situation back there?
In conclusion, the fence is a waste of money and a bad response to a real problem.