Communism isn’t bad per se, authoritarianism is, but there are many authoritarian regimes going under the name ‘communist’, thus we have a term for that: tankie. Using different terms to describe the Israeli state (like fascist, ethno-nationalist, or Zionist) and its supporters does not mean it’s not bad. It really is! It’s just categorically different in the ideology espoused by them, and having language to describe that is not bad.