A re-post from the piece on Naomi Klein which applies here even better -

The western left/commmunists history is a history of infamy – a history of absurd subservience to the Komintern and the Soviet Union’s interests.
I will remind you here only Lilian Hellman’s and her enlightened coterie’s attitude during the Finnish War.

And what gives even more dramatic dimensions to the distorted history which is taught in American schools, is that if you ask students about a war that happened in Europe in the thirties, they’ll all talk about the Spanish Civil War where the left was the good side and Franco’s army was a collection of monsters, and not about the Soviet Union attacking Finland without any provokation, and with utterly untenable justifications – and the Soviets’ actions and sub-sequent victory and unfair peace conditions being firmly supported by communists erywhere in the world.

P.S. vis-a-vis Guernica: during the Guernica bombing died about 300 people, while during the Barcelona May days, when the pro-Stalin communists took on syndicalists and anarchists, died close to 900 – as now tell this Naomi Klein.