Precisely why they do it. Because it WORKS so darn well, and I think they get a high from just watching us get more bewildered, muddled and thinking WE are going ga ga.
Of course while we are in this manic state, we are perfect targets for them to fire more flaming arrows of blame and accusation at.
Best of all, while we are kept busy wondering about our sanity and dodging the arrows, we aren't looking at THEM, and they can keep on doing as they want to.
Sneaky little critters, aren't they?
God bless