The 'Minuteman Militia'

I can't understand why anyone legally in this country would be against the Minuteman. As long as their not breaking any existing laws then they should be commended for their civic duty. A lot of people oppose them because of the inherent nature of militias in general and the fact that the people attracted to this type of militia are most likely or obviously anti mexican. Though what is the point of a border and immigration laws if the border is not fiercely defended? Are we to justify the widespread disrespect for our immigration laws by Mexicans because life in Mexico doesn't offer the same opportunities? That is the twisted logic of some. In reality we (America) should have some sort of physical barrier securing the border. Again, I can't see any logical opposition to this outside of the financial side of it. I am not anti immigrant of any sort. America is very pro immigrant; that's the whole "melting pot" thing, but immigrate the legal way and assimilate. Anyone, anywhere trying to sneak into the country should be considered a risk and potential liabilty and treated accordingly. Its a wild concept I know.