Here's a little bit of a history lesson for you then:
"America's first marijuana law was enacted at Jamestown Colony, Virginia in 1619. It was a law "ordering" all farmers to grow Indian hempseed. There were several other "must grow" laws over the next 200 years (you could be jailed for not growing hemp during times of shortage in Virginia between 1763 and 1767), and during most of that time, hemp was legal tender (you could even pay your taxes with hemp -- try that today!) Hemp was such a critical crop for a number of purposes (including essential war requirements - rope, etc.) that the government went out of its way to encourage growth.
The United States Census of 1850 counted 8,327 hemp "plantations" (minimum 2,000-acre farm) growing cannabis hemp for cloth, canvas and even the cordage used for baling cotton.
Again, racism was part of the charge against marijuana, as newspapers in 1934 editorialized: "Marihuana influences Negroes to look at white people in the eye, step on white men's shadows and look at a white woman twice."
Two other fear-tactic rumors started to spread: one, that Mexicans, Blacks and other foreigners were snaring white children with marijuana; and two, the story of the "assassins." Early stories of Marco Polo had told of "hasheesh-eaters" or hashashin, from which derived the term "assassin." In the original stories, these professional killers were given large doses of hashish and brought to the ruler's garden (to give them a glimpse of the paradise that awaited them upon successful completion of their mission). Then, after the effects of the drug disappeared, the assassin would fulfill his ruler's wishes with cool, calculating loyalty.
By the 1930s, the story had changed. Dr. A. E. Fossier wrote in the 1931 New Orleans Medical and Surgical Journal: "Under the influence of hashish those fanatics would madly rush at their enemies, and ruthlessly massacre every one within their grasp." Within a very short time, marijuana started being linked to violent behavior.
If you want it summed up: MJ is only illegal because of racism in the early 20th century. There were no studies done, no scientific basis, and up until this point even doctors could prescribe MJ for a plethora of reasons, and did so freely. Your first 2 drafts of the declaration of independence was written on hemp for Christ's sake. And it only remains illegal because the pharmacological and tobacco companies would lose BILLIONS if it were made so. And every single politician knows this. Including, unfortunately, Obama.
IMO, the last 10 thousand years of its use without people going bonkers from it is enough evidence for me. I've yet to see any study of the crazy hippies from the 70's that experimented with MJ and other hardcore drugs, that have made it into positions of extreme importance, like oh I don't know, PRESIDENT, do anything other than remain sane. I'm fairly certain a great deal of our parents that grew up in the 60's and 70's did a lot of experimentation with drugs, and I'm fairly certain a lot of us grew up pretty good and didn't have any abnormal issues with them. And I agree with your post completely.