The Chinese government fears “people’s desire for democracy” and its repression of human rights is “an existential threat to the world”, the investigative and advocacy group Human Rights Watch said on Tuesday at the launch of its World Report 2020 in New York.The release of the annual report had already made headlines when immigration officials at the Hong Kong airport turned away the group’s executive director, Kenneth Roth, without explanation on Sunday. He had been scheduled to unveil the…