You could draw a similar diagram in other contexts. Antivaxxers coming from the left-leaning hippy crowd and converging with the religious crowd on the right. Etc.
Sam Harris straight up started a "Free Will isn't real, now come cherrypick Buddhism and blame Arabs for destroying Europe with me!" cult, and became best bros with Jordan Peterson.
This sucks so much. It was so disappointing, I looked up to this guy a lot. His books were the key part in my radicalisation pipeline but now I see him praising Musk and other stuff like this :(