Polemic

Contentious rhetoric

Polemic is contentious rhetoric intended to support a specific position by forthright claims and to undermine the opposing position. The practice of such argumentation is called polemics, which are seen in arguments on controversial topics. A person who writes polemics, or speaks polemically, is called a polemicist. The word derives from Ancient Greek πολεμικός  'warlike, hostile', from πόλεμος  'war'.

This keyword could refer to multiple things. Here are some suggestions: