For anyone interested, there's more to the accusation of Stoltenberg's involvement with intelligence from a young age than the author of this article implies by dismissing it as ridiculous on its face.[1] Whether or not you find the linked narrative convincing is up to you, however.
His family origins? You mean being the son of a politician who was staunchly against the vietnam war? To the point that he was honoured by the Vietnamese post war?
The same Jens Stoltenberg who was against and protested the american war against Iraq from the beginning?
As a Norwegian I have never voted for Jens Stoltenberg or his party, I am slightly more to the center in our politics. However I find the patreon article dishonest and completely speculative. It has no evidence whatsoever just tries to paint normal things in a conspiratorial light.
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.
[1] https://www.patreon.com/posts/unlocked-young-78471711