polemic       
noun [ C ]  formal uk/pəˈlem.ɪk/ us/pəˈlem.ɪk/
 辩论文章;激烈的争辩
a piece of writing or a speech in which a person strongly attacks or defends a particular opinion, person, idea, or set of beliefs
  She has published a fierce anti-war polemic. 她发表了一篇言辞激烈的反战文章。