It is, but not when they try to "educate" everyone around them at every breath they take, every text message and every conversation.

It ended up with everyone saying "dude stop, we don’t care at all" and him apologizing then saying "ok sorry, my mistake, I explained it wrong that’s why you didn’t understand".

Again and again and again. It is a disease that needs medical treatment (psychiatric, the same as people leaving cults) and the way he described it fits the description. He said that he "fell in it" (tomber dedans in French, as in falling in a pit) by being bored at work and watching too many YouTube videos to pass time.

We tried to help, but after 2 years we were exhausted. Dude doesn’t want to be helped and we are not medical professionals.

Last news was that he now hangs with another former friend from school that also refused to change and get help, the only cocaine addict of our small town. To the village they are known as the crazy guys sitting on a park bench all day and feeding each other craziness. To them they are probably the only two enlightened dudes and everybody else is too dumb and needs to be awoken.