Speaking generally here - not addressing anyones comments directly. Many who say he could not be a patsy don’t fully understand the concept.

Here is my take:

The concept is that the patsy takes the blame and attention off of the real forces behind the activity. Calling someone a patsy doesn’t imply he took no part in the operation. It means he was set up to take the fall, in the eyes of the public and legal domain.. This is done by whatever means possible, as long as the group truly behind the offense doesn’t get identified.

This kid doesn’t seem to have a cogent public profile yet. Apparently raised in ‘right wing’ household environment, Yet either left or right extremism could have been used to convince him to participate if he was vonerable to suggestion.

edit: It is entirely possible he acted ‘alone’ but I’m thinking not.