Buying in USTs is split by the time of the day: foreigners buy heavily then Americans sell. Why?

Treasury trading today (11/1) was another perfect example of the insanity gripping the marketplace. Americans are more afraid of the Fed and its rate hikes which are based on psychology not economy, so they sell Treasuries. Meanwhile, foreigners can't get enough of them, increasingly afraid of the actual economy and what *more* the dollar will do to it.