There are good points in your posts. Definitely. Socialist-Revolutionaries (SR) where Bolshevik Allies till Bolsheviks decided they don't need any allies anymore. However, who knows how things could have went if Fanny Kaplan had succeeded in ending earlier the life of Lenin. Again, we never know, but I think regardless of her motives, she deserves a big credit for trying to end the life of this bastard.
Also, let's recall the 1944 assassination attempt on Hitler by Claus fon Stauffenberg et al. ? The plotters where Wehrmaht officers who initially were faithful Nazis, but realizing that the war was futile, wanted to finish Hitler off. Whatever their motives where, the end result could have been earlier end of WWII and literally millions of lives saved.
http://www.answers.com/topic/july-20-plot