Your comparison doesn’t make sense.
Commies purge other commies because they hate freedom and fear their enemies who want to usurp them.
The GOP needs purging (substitute another word if you like) of defeatists, moderates, RINOS, social liberals, tax and spend liberals, east coast and ivy league elitists, snobs and similiar deadwood that gave us Obama. (Along with ACORN, middle eastern money, and the MSM which is a wholly owned subsidiary of the Democrat party/leftsts.)
Thank you. Almost any other word (and notion) I would gladly accept.