Weed is the "wisdom" plant?

According to the article at Wikipedia on Rastafarianism, “Haile Selassie visited Jamaica on April 21, 1966. Somewhere between one and two hundred thousand Rastafarians from all over Jamaica descended on Kingston airport having heard that the man whom they considered to be God was coming to visit them. They waited at the airport smoking lots of cannabis and playing drums.” How can you demonize the same book from which you find a “confirmation” of the man you believe to be God-incarnate. Perhaps this is where the problem lies, “they waited at the airport smoking lots of cannabis.” Of course, since “Babylon system is a fraud” (never mind we buy and sell from within the same system), they will consider it [weed], illegal. The article goes on, “They are not surprised that it is illegal, seeing it as a powerful substance that opens people’s minds to the truth – something the Babylon system, they reason, clearly does not want. They contrast their herb to liquor, which they feel makes people stupid, and is not a part of African culture.”

But it is reported that some of the negative side effects of weed are, “paranoia, dry mouth, respiratory problems and nervousness/racing heart. Other effects may be negative or inconvenient in certain settings or situations including reduced ability to concentrate, impaired memory, tiredness, and confusion.” Paranoia? Reduced ability to concentrate? I rest my case.