The biggest crime of communism is its destruction of the human soul.
A key goal of communism is to demoralize societies—to destroy the culture, religion, and basic values of any society it touches. This goal is laid out clearly in “The Communist Manifesto,” in which Karl Marx and Friedrich Engels wrote in 1848 that communism “abolishes all religion, and all morality.”
The most terrifying thing for someone is the destruction of faith, belief, and morality. In the Bible, the Book of Matthew states, “Fear not them which kill the body, but are not able to kill the soul: but rather fear him which is able to destroy both soul and body in Hell.”
We’ve seen repeatedly that the goal of communism is to destroy the soul of humankind. https://www.unionpeace.org/time/communism-is-satanic-by-nature.html
To make Marxism work, originally, they used class. They set the lower classes against the upper classes. Obviously, it was just a ruse to get the upper classes replaced with a new upper class who wanted to be in control of everything.
Sadly for the Marxists, the working class were not too keen on joining the revolution so they failed to take over the world.
This time, in the US at least, they just replaced class with race. They are trying their best to set the races against each other to achieve the same end.