It is hypocritical not to believe in the right of conquest. Except if you live in Antartica, you live on land that has been repeatedly conquered, and you have no right to be there other than the right conferred by conquest. If the Mexicans can recapture Texas, it will be because we Americans have become so weak we no longer deserve it.
P.S. I'm not sure I'm right about this, but think I am.