WASHINGTON – The United States Monday announced a diplomatic boycott of the 2022 Beijing Winter Olympics, a calibrated rebuke of China’s human rights record that stops short of preventing US athletes from competing. The decision comes after Washington spent months wrangling with what position to take on the Games, hosted in February next year by a country it accuses of perpetrating “genocide” against Uyghur Muslims in the northwestern Xinjiang region. There was no immediate reaction from Beijing, but earlier Monday the Chinese foreign ministry had threatened “resolute countermeasures” if any s…