Your implication is beyond ridiculous and if you believe that there is any political motivation to Hinckley's release whatsoever, that is extremely sad for you.
Releasing him? I don't know. Fortunately, I'm spared from such a decision since I'm neither one of the physicians treating him nor the judge making the final decision.
However, considering he is 61 years old, has not been convicted of a crime, and his treating doctors believe that releasing him is safe, I think there's a reasonable chance that releasing him won't endanger the public. I'm certainly in no position to argue with his treating physicians.
A 34-year sentence is well beyond what would be typically imposed on someone actually convicted of attempted murder.