The answer is incredibility simple. WE are treated as potential enemy because there is no control of the borders or immigration. When anyone with any intent can get into the country and assimilate into society without the core values the make up the values for good standing citizenship (membership in a society) at any time then the society, any society, has becomes hopelessly contaminated and must treat every member as a potential threat.
Every major terrorist act has an outside component. 9/11, Oklahoma City, Foot Hood, Pan Am bombing, first WTC bombing, Boston, and on and on.
We allow people with very questionable backgrounds to legally immigrate. We allow overstayed visas. We fail to deport hardly anyone. And then we say we need to be safe.
Our country is our society and visits should be limited and strickly and even harshly controlled. Immigration should be streamlined but it should be controlled with very strict and even harsh review. Visas should be closely monitored. Overstays should be addressed rapidly - and harshly.
With the current situation we are all treated as potential terrorist by our own government and we are treated as the enemy by our own naturalized citizen neighbors. Which is the chicken and which is the egg. We have ignored the meaning of citizenship and the need for controlling both visitation and immigration into OUR society. We are now paying a price for that.
(PS - if this sounds anti-immigration and anti-naturalization it is not meant to. It is clear our standards for entry into our country and our society as permanent new members or visitors are very lax and very low.)
http://therightscoop.com/video-this-is-awesome-my-name-is-paul-weston-and-i-am-a-racist/
Paul Weston is a British politician and leader of the Liberty GB party in the UK who dearly loves his country and want the culture to stay the same.