Alienation is the reality of the alien invasion.
An invasion is possible only when we tolerate social alienation as unavoidable.
We expose ourselves to "aliens" when we do not manage our own lives directly.
We enervate our species "health" — or species' "immune system" — and thus, make a home for anything alien as parasitic.
The pathos of our intra-species social relations determines any inter-species relations.
Right now, we are screwed-up in terms of alienation, and thus, as a result, we are screwed in terms of aliens.