Do you think that heavy psychedelic use is what caused them to commit suicide, or do you think that these people had their own inner demons, which they tried to combat with psychedelics?

In my experience a lot of people with their own issues are drawn to psychedelics as a means managing their demons. In the right setting, they can be incredibly healing. However, for some people, psychedelics become a means of coping, tripping becomes their default state and reality becomes too much for them.