The Consecration of Russia to the Immaculate Heart isn't referring to Russians having this devotion except as a possible eventual result, someday. The Consecration means simply that the Pope would say a prayer entrusting Russia to Our Blessed Mother. That is what the word consecration means in context....A prayer the Pope and Bishops would say that would bring graces to Russia to end it's errors which is Communism...
Our Lady also said the errors would spread.. And Communism did spread even in more hidden ways such as the liberalism in North America. I read how Communists also legalized abortion and now it's everywhere
Our Lady also said in Fatima there would be WW2 if people don't turn to God and even prophecied the time it would begin and that it would be worse than ww1 ...and the mysterious red light that appeared shortly before that even Hitler noticed and at that point he made a decision that lead to the war