In a Red Dawn scenario, the enemy would be clearly armed. In this scenario, their weapons are, in fact, their shield.... the fact that they are not armed ... are supposedly harmless victims... and are merely seeking refuge or asylum from violence. Problem is.... this flood of "victims" will only continue and get worse IF we let them in. Right now it's 4,000. What if it ends up being 4,000,000? Where do we draw the line? If not here and now, where?
You cited that link to Soros and Obama having orchestrated the Muslim 'Refugee crisis' in Europe. Look a the results of that. It was an invasion army and Europe is being conquered from within and violence, rape , murder and other crap literally goes unpunished as their society is fundamentally transformed into Islamic states.
They are attempting to do the same thing here with South Americans/Mexicans with a sprinkling of ISIS and Jihadists among them for good measure.
If we do not treat that as an invasion army with hostile intent - then we lose the country as Sweden, Germany, France and the Netherlands already have, and all these 'politics' we are busying ourselves with are an exercise in silly futility, as an assured fate of being conquered from within by an army of migrant Communists and Islamists is assured.