Her generation, though, didn't know about the failures of socialism. They thought they saw the failures of capitalism in WWI and the Great Depression and reacted against them.
I do notice that she met every president from Grover Cleveland to Lyndon Johnson, so they must not have held her ideas too much against her.
She may not have known about the USSR’s horrors, or those of the various Communist movements, but she most certainly knew about the horrors conducted by the Jacobins during the French Revolution, so she still deserves to be condemned for that especially when she voiced praises for that event and indicated she had zero regret for it. I believe her exact words there were, and I quote, “I am not for peace at all hazards. I regret this war (World War I), but I have never regretted the blood of the thousands spilled during the French Revolution”.
And quite frankly, that alone deserves her to be blacklisted from textbooks. It’s already bad enough that Marx was inspired to make Communism from the French Revolution, especially in the sense that he wanted to make it an even gorier retread of that event.