The split did cause division amongst communist parties throughout the world, but I believe that the split was necessary to break off from the Khruschevite revisionism. When Khruschev started to pursue the whole "peaceful coexistence" strategy, he completely abandoned Marxist revolutionary theory and opted for bourgeois tactics, i.e. parliamentary change within, "beating" the west in "consumer goods," etc. The USSR stopped actively supporting revolutionary movements globally after that point and called for communist parties to abandon that method. The split did cause people to choose sides, but it was necessary for the survival of revolutionary communist movements, especially after all the major pro-USSR parties started to mold into reformist social democrats only calling for "Change from within." Eurocommunism is the bastard offspring of Khruschev's policies, and we still have to contend with their revisionism to this day.