Marijuana CANNOT cause mental disorders. It can trigger underlying things that would have come to the surface anyways, regardless of drug usage.
I think If you are genetically predisposed to any kind of mental disorder, smoking can increase the chance of getting it. It useually happens to people who would have gotten the disorder anyway later in life. EDIT: yeah basically what stella said
It has not been proven to cause any mental disorders, but it CAN STRENGTHEN mental disorders that were already present or was onsetting.
quite similar to the whole thing about LSD making you insane it does not CREATE a disorder, but can bring a disorder to the surface earlier than it would but the disorder would have shown itself regardless of using drugs
Honestly, if I hadn't started smoking weed so early on, I really think I would have my anxiety under more control. But that doesn't mean weed CAUSED my anxiety, it just intensifies it and also creates a distraction from facing it, which obviously is no bueno.