What passage in your quoted material supports your contention that "death from marijuana is common"?
Raising susceptibility is not the same as "causing" death. How 'bout the passage that states "Clinical studies in humans so far, though, haven't demonstrated that these effects are clinically relevant". How does that support your contention.
Uh, the word "common" and the fact that every demented pothead I have met has a chronic wheeze.