I've been reading Pat Buchanan's State of Emergency
Well there's your problem.
Really Mexico isn't providing any impetus for immigration nor is there any sort of conspiracy promulgated by the Mexicans that is trying to take over the Southwestern United States. You have to remember we are talking about Mexico here. Mexico, the country that couldn't find Subcomandante Marcos, Mexico, the country that for most of its life was mirred in debt, Mexico, the country that lost territory to Guatemala of all places. Do you seriously believe that Mexico could pull off a conspiracy of the magnitude crazy Pat is talking about? Plus what would be the objective of this "reconquista"? It would do nothing more than piss off Mexico's largest trading partner and the country that, because of free trade, has helped the Mexican economy to develop and grow by leaps and bounds over the past 20 years.
Which, apart from Charles de Gaulle standing on the balcony and shouting "Vive le Quebec libre!" (which was just posturing), amounts to nothing. So that analogy (which is presumably mentioned in the book), falls flat.
Still even that is a significant thing to do.
Is Quebec independent? Are French troops helping blue-clad Quebecois
Gendarmes Nationale patrol the streets of Quebec City? No. Words, especially meaningless words that are not backed up by any action at all and are spoken by Charles De Gaulle, are insignificant.