witch-hunting

noun2

1. •
   An engagement in a political witch-hunt; unjust or ideologically motivated persecution.

   • Noble had accused the Rugby Football League of "an element of witch-hunting" before accompanying Fielden to his disciplinary hearing, which he admitted was "disruptive" in cup final week. — 2003
2. •
   (historical) An engagement in a witch-hunt; searching for witches or for evidence against them.

   • Witch-hunting became a mania, with all the abuses and excesses which invariably develop with fanaticism. — 1965