I'm not so sure. I live here and this is the first word we've heard of any neo-nazi types in the area.
More likely it is some sort of twisted propaganda thing to discredit and stifle any sort of normal public outcry at our failed border security. The general idea is to equate, in the sheeple's minds, that any sort of objection to porosity at the border means "nazi". Rinse, lather, repeat. It's a pretty effective technique, though pretty scurvy.