>>401747782
The monkey was at fault for being an animal and not controlling it's instincts. That's what separates us humans from animals. 
Just because the cripple had thoughts of murder does not mean he ever would've committed any crime. Claiming otherwise would be approving of thought policing.
Then again, the issues, as the cripple has noticed as well, was that his connection to the monkey was turning him primal too, seemingly causing all the outbursts of rage.