An idiotic argument those on the far right frequently invoke is the claim that Communism killed 100,000,000 people. They use this to argue against Socialism, because they're too stupid to know the difference. They also use this to argue against "Cultural Marxism" which is a Red Scare boogeyman that has been used for nearly a century, including by Nazi Germany under Hitler. To these people, everything to the left of Mike Pence falls under "Communism" and they use all the terms interchangeably, even though they have very different meanings. They equate Authoritarian Communism with Democratic Socialism, the latter being the ideology with which progressives like Bernie Sanders and AOC identify; however even that is a misnomer because the policies of Bernie Sanders are actually Social Democratic.
Back to the argument about the death toll of Communism, this is something many political hacks will trot out without providing any evidence or citing any sources. To anyone who has been debating religion and atheism as long as I have, and a lot of you have, this will sound very familiar. It's similar to the claim by fundamentalist Christians that "atheism" killed X million people, where they say Stalin, Mao, Pol Pot, and other Authoritarian Communist dictators were atheists who killed in the name of atheism. Figures range from 50-100 million. This claim is incredibly stupid and easy to debunk, given that atheism is not a religion, and Communist rulers only implemented state atheism to prevent other religions from competing with their political ideology. Their actual religion was Authoritarian Communism and worship of the state, where all the power and wealth was consolidated. There was no overabundance of rational thought or humanist values.
Even if you accept the premise that Communism caused all these deaths, most of the deaths resulted from structural violence, meaning poverty and starvation. It could also be argued that rulers like Stalin were not actual Communists, and only claimed to be in order to pretend they were on the side of working people. Notice how most authoritarian rulers dress up in military uniforms. This is a facade intended to show that they're just like anyone else who would serve their country, rather than a god emperor. For a self-proclaimed Communist, Stalin cracked down on worker's rights, including the right to collective bargaining and healthcare, and amassed resources in the state instead of redistributing them to those in need.
However, let's assume all of those premises are true. Using that same logic, what is the death toll of Capitalism? Well--
That's more than twice the number, and that's looking only at the US since its founding. It does not include the policies, war crimes, and human rights abuses of other imperial powers. If it did, that figure would be much higher, because one would have to include the effects of European imperialism, as well as Japanese imperialism in the leadup to WWII. European imperialism brought the Trans-Atlantic Slave Trade, and the colonization of the New World, Africa, and Asia. This included the genocide of Native American civilizations, the horrific wars that carved up Africa, and in China two of the bloodiest land wars prior to WWI when the people tried to rebel against the puppet government in the Taiping and Boxer Rebellions.
To quote Vladmir Lenin, imperialism is the highest stage of capitalism. We're seeing it today, where the US must continuously invade other countries to jack their natural resources, to punish them for going off the petrodollar, and to install puppet regimes that do our bidding. War is a racket, war means profits for weapon manufacturers, military contractors, and fossil fuel companies.
If those on the far right really want to compare body counts, the Capitalist system they worship is unequivocally worse.