He was a great thinker, journalist and historian. His economic theories are fundamentally flawed and wrong as proven by history and subsequent understanding. But, they're still valuable as historical documents and intellectual exercises.
Also, it's ridiculous to lay the crimes of 20th century Marxists at the feet of a writer.
Probably the second or third most important person to have ever lived, accounting for only Jesus Christ and Adam Smith. Definite FF, even though a lot of what he postulated and predicted has at this point been refuted and/or hasn't happened yet. Hopefully that changes in the next century or so, and the social parasites are once and for all brought under heel.
What is that supposed to mean?