No Tom, the mistake the US made was not stopping until you owned the entire continent :)
>We made a drastic mistake after the Mexican American war. We gave back Mexico to the Mexicans, and did not annex it. Had we annexed Mexico, we would not have this problem of “illegal aliens from Mexico”. Why we would all be “good Americans”! :)
In the End, we will remember not the words of our enemies, but the silence of our friends - Martin Luther King, Jr.