But the Buddha has never blamed the Sakra god or anyone who comes and ask for His suffering because He knows that will help Him to clean up whatever residue of karma and further push Him towards Buddhahood. These are helpers. The same with Devadatta; He has never blamed him, He has never hated him. His cousin who always tried to harm Him, life after life. But He has never blamed him. There are good and bad forces: good police, bad police; good guy, bad guy. And anything that tests our endurance is helping us to strengthen our spiritual endeavor, strengthen our faith in ourselves, make us more strong, more courageous.