would these people be complaining if the illegals were hostile space aliens doing long-term reconaissance of human beings?

In their defense, such a show would have 'preposterous' written all over it.

But in any case, I'd expect the sentence "It sounds preposterous, but" to end with "it's based on real life". Not "Joe Weisberg is a CIA officer (so he must know something we don't)".

Wasn't UK also on the illegals list? Who knows, maybe one of them wrote this ;-)