Biological analogies of system integrity and preservation are apt to political systems.
With respect to the immune system, one component is exclusionary: The border is like skin. Let bad stuff in, and the system (biological or political) has to work that much harder to find and neutralize it. Sepsis—blood poisoning—is very bad, and happens when the invading agent has free reign to circulate throughout the host. Sounds like... refugees seeded into welcoming communities, doesn’t it?
I think they are also.
On a different note-If a Muslin in this country "gets religion" and on his own loads up a machine gun and goes to a local mall or school and starts mowing down Infidels, there is just not much you can do to prevent that from happening.
The more Muslims you import into this country the more episodes like that you can expect to happen.
Unlike a Muslim, if a Christian "gets religion" he is not going to be a physical threat to others. -Tom