Should be included, but the fact that the Soviet Union was established and many more Socialist States and liberatory movements around the world have successfully applied Lenin's analysis and tools to their own conditions speaks to its practicality. Einstein made a good case for Socialism in Why Socialism? but falls into the same trap many Western leftists do in denying actual leftist movements as "legitimate." Einstein is speaking against himself here, in admiring Lenin's devotion to social justice and referring to him as a genuine "guardian and restorer of humanity," surely he can see that the practical results of that devotion are a consequence of Lenin's methods?

When did he said it? If in any time after 1905, he would be flat wrong. And if after 1917, it would be ridiculously flat wrong.

I suppose they approve of mass murder