I believe they are trying to see what the populace will tolerate. It has nothing to do with immigration. It's DHS flexing it's muscles.
i agree too, but i was attempting to provide an alternate and possibly positive theory to these maneuvers too. i know I'm in lala land with my alternate theory, but heck, 1 can hope can't they?

the thing is though, IF what i read was true, 2yrs ago, a census was taken across america, and nw america has more militias and preppers than the rest of the US. but again, IF the DHS article was true, but also texas and the other sw states within the training ao might have seen a massive influx in militias, peppers and patriots within the 2yrs after the report came out.