demonization
noun(British English also demonisation)
[uncountable]the act of describing somebody/something in a way that is intended to make other people think of them/it as evil or dangerous 把…描绘成魔鬼（或危险人物等）；将…妖魔化 the United States' demonization of Japan during World War II 二战期间美国对日本的妖魔化