There has been obvious political bias in his reviews, but also in off the cuff comments made in informal settings. He is an extreme leftist who can’t just do his job without adding his own bias. That would explain maybe why foreign and other sucky films got thumbs ups when the viewing public disagreed vehemently.
And Foreign language films have never done well in the U.S. unless it's some schmaltzy piece of fluff like ‘Life is Beautiful’ or ‘The Postman’.