I think he was a mentally ill patsy the feds kept on ice for something like this.
The Program was called MK Ultra.
Agree
Check this out showing his fake facebooks and other social media. The interesting part is toward the end where she shows an American version of the Cesar character who focuses on anti-democrat and compares it to the British character who focuses on ISIS.
https://www.youtube.com/watch?v=XZiGXgsKQTI - “Package Bomber Disinfo? Cesar Sayoc fake Right Wing Profiles Everywhere”