They murder everything that moves.
If they're mortal, they have mortal weaknesses. They'll be stopped, somehow.
All communications are out... which is why these tape recordings I'm making are for the sake of future history - if any.
I have never seen blood crystals as anemic as these. They may be mental giants but physically, by our standards, they must be very primitive.
What do we say to them?
"... welcome to California.