Greg Campbell makes the claim:
Both are high-demand commodities controlled by vicious gangs who seek maximum profits regardless of the human cost. Both are traded through well-established black markets immune to governmental schemes to eradicate them. Violence-fueled greed threatens the very fabric of the countries where they’re produced.
But there was one striking difference. Unlike the consumers of blood diamonds, who were once kept in the dark about the brutal origins of their luxury goods, pot smokers can’t feign the same ignorance about the vicious gangs who grow and sell their weed. Considering the tonnage of marijuana smuggled annually into the country from Mexico, it’s certain that millions of American smokers are getting high on blood-tainted pot.
The Dish 