I'll agree that it does lack hard evidence, but it presents very important and relevant context about the groups that Jens was associated with at the time, and what became of those groups and him. What are the chances that some young person would change teams so suddenly and extremely? It's common for teenagers to pass through a rebellious phase, but the timing (of the reversion to daddy's team) here seems too abrupt, and the quick passage to the exact opposite position seems suspicious. The Patreon post also discusses how many other figures in that circle became double agents, which is highly relevant.