What does communism have to do with progressives or conservatives? These topics are not related. Unless you are pointing to deadly conservative communist governments like the CCCP.

Communism: an economic theory where the stated goal is achieving socio-economic equality.

Social conservationism: a social theory based on returning to regressive "traditional values" and oppression of "deviants".

Totally the same thing.

I see you've read "Everything I Hate is Communism ; an Idiot's Guide to Politics"

Bad bot

The right have killed significantly more than communists. We just don't label it as murder when it's capitalists, because making "lower beings" suffer is the intended effect of capitalism. Why is it not capitalism's fault when conservative states fail catastrophically and cause the deaths of millions, but when a communist state fails it's suddenly socialism's problem?

Conservatives refuse to acknowledge that capitalism is built on mountains of bones, hubdreds of millions of bones at least, and is still completely dysfunctional. Their criticism of better ideologies is just projection of that.

Well sure, but only self-identified communism rather than real communism. Like the National Socialism Party, the Chinese Communist Party, or the Union of Soviet Socialist Republics. They were all "socialism" and "communism" where the rights to everything were held exclusively by the state which was controlled by small groups of individuals. To me that doesn't sound like it fits the bill, but whatevs.

How is that possible? Actual communism has literally never existed.