IMO smoking large amounts of weed on a daily basis was a major cause of Bob Marley's cancer.
Just admit that you're talking out of your sphincter and we can all move on with our lives.
Pot can Lower your Immune system's abilities and That can help any illness to kill you.
His father died young also. Who know what was in Norval Marley's background anyway? Toe cancer isn't caused by smoking weed. I work with a lot of Jamaican rastas and the biggest problem with the heavy tokers is phlegm in the lungs which usually disappears when they use fronto leaf instead of white bleached rolling papers. Most have stopped smoking since I put it into their minds that weed makes a man limp over time :D