Unfortunately, communism has earned a fatally bad reputation after being misused by so many dictators during the 20th century.
The murder part of communism is a necessary component to deal with people who don't want to play along. That's why it happens all the time.
If you don't want to play by the rules of a society that has anything resembling a market economy, the outcome is well known: Your standard of living slides down to the lowest your fellow citizens will tolerate seeing.
If you don't want to play by the rules of a society with a Marxist economy, well, abject poverty is always an option there, too. A rather common one. But if you want to work for yourself, and keep a significant portion of the fruits of your labor? Well, sorry, that's where the murder comes in. Against the fundamental rules of the society, you see.
If you disagree, kindly tell me what you do with people in your ideal communist society who want to put in above-average effort, and reap the extra rewards. Besides murdering them. The communist societies that exist within larger market economies can eject slackers, and the motivated can simply leave. The societies that are entirely communist need other options. Exiling the motivated will simply rapidly impoverish those that remain.