By putting a smiley face after the sentence about body count, you show that you think about this as an abstract intellectual game. If European colonialism killed a lot of people, how does that justify the horrors of 20th Century communism? Are you trying to say that, well, colonialism killed people too, so it’s OK that communism killed millions of people? Does that really make sense to you?
If a theory, when put into practice, causes the deaths of millions of people, wouldn’t you say that theory is wrong? What kind of atrocities have to be committed for you to admit that a theory is wrong? Naziism was just a theory until Hitler came to power. Can’t we measure the validity of the theory of Naziism by its results in the real world once it was implemented? Millions killed in concentration camps, millions more killed in expansionist nationalistic wars - is the theory that led to this a good theory?
If the theory of Naziism can be measured by the results it produces in the real world, why can’t the theory of communism similarly be measured by the results it has produced? Millions killed in Stalinist purges and gulags, millions killed in the “Great Leap Forward” and the “Cultural Revolution,” how many killed in communist wars of aggression like in Vietnam or the killing fields in Cambodia? How much human misery has resulted from denial of basic human rights in Cuba, Eastern Europe, and other places infected with communism? Could the theory behind these atrocities be a good theory if it led to these kinds of results?
Are you seriously trying to argue FOR communism? After the really incalculable suffering it has produced in the 20th Century?
The OP was talking about communists, not social democrats or other left-leaning parties. Communists believe in class warfare, violent revolution to overthrow the existing government and seize the means of production, the installation of a ruling elite (the Party) that will use any means necessary to suppress any opposition. Their whole philosophy is founded on an atheistic world view that not only denies the existence of God, but sees religion as evil (hence the brutal repression of Christianity in communist countries.) Religion is the “opiate of the masses” that keeps the workers from seeing how oppressed they really are, and so makes it harder to stir them up to revolution. This is what Marx and Engels wrote about in the Communist Manifesto.
Communism has been so discredited and exposed, I’m really surprised there is anybody who would try to defend it.