Unless you mean anarchist conceptions of communism, ie communalist structures, all Marxist formations recognize the necessity of the working classes using state power, ie authority, to protect the gains of socialism and gradually collectivize production and distribution. In that sense, all communism can be seen as authoritarian, at least until all production and distribution is collectivized globally and thus the state finally fully withers away.
Further, worker owned governments with public ownership as the principle aspect of the economy are never fascist, fascism is uniquely tied to capitalism in decay.
Unless you mean anarchist conceptions of communism, ie communalist structures, all Marxist formations recognize the necessity of the working classes using state power, ie authority, to protect the gains of socialism and gradually collectivize production and distribution. In that sense, all communism can be seen as authoritarian, at least until all production and distribution is collectivized globally and thus the state finally fully withers away.
Further, worker owned governments with public ownership as the principle aspect of the economy are never fascist, fascism is uniquely tied to capitalism in decay.
Just my 2 cents on the matter.