I'm referring to the entire interview of Beth and Jug by Greta.
It could be that the VDS's became hostile from day one after being approached by the Twittys and friends and considered them as those crazy cowboy Americans.
I suppose, especially him telling his son that he didn't have to answer their questions in the middle of the night. But I don't think that being angry accounts for his sweating and general demeanor when he was with Beth and Greta.
To each our own interpretation :)