One who deviates from accepted beliefs or policies, especially from a prescribed form of Communism.(noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "deviationist" in a sentence
"The Islamist party's Selangor leader Datuk Hassan Ali has been at the forefront in policing what he called deviationist movements like the Ahmadiyah and stopping the sale of alcohol in Muslim-majority areas."
"Right now, it’s pretty much just me and DTM, but I’m starting to think he’s a right-deviationist from the true path of joeism."
"CPUSA elements from SDS leadership and declared the refurbished SDS leadership would be responsible for the correct Marxist-Leninist line and would exclude non-Maoist, "deviationist" views."