hardliners

/HH AA1 R D L AY0 N ER0 Z/
noun
  1. 1

    A person who takes a firm, uncompromising position on some policy.

Source: https://en.wiktionary.org/wiki/hard-liner, https://en.wiktionary.org/wiki/hardliner, https://en.wiktionary.org/wiki/hardliners