Personally, as a traditional Catholic this doesn’t bother me as much as his apparent contradictions with Traditional Catholic teaching. I believe to answer your question though, a “good” Marxist to Francis is probably a person, who though not Catholic, follows his conscience. So all’s good.
So let me get this straight
if a person's conscience leads him to believe in something immoral, unworkable, and evil like Marxism, it's okay as long as it was reached through his conscience? Sorry, I do not agree
that only indicates a flawed conscience
.or perhaps a lack of understanding of what Marxism is and who Marxists are.