Okay, buddy - (a) I never accused you of being a retard. I might throw the occasional "'Tard" towards someone being pointedly idiotic but as I have an older brother who was born with severe physical and mental difficulties I do not use the word "retard" lightly.(b) The reason stereotypes come into being is because they have at least a grain of truth to them. There have been entirely too many studies done on the effects of THC reacting with the human brain to think that there isn't some sort of detrimental effect on those who use it. Whether or not those effects are short-term or long-term and/or permanent is still highly debated but that is neither here nor there.
©You're very intelligent? Well, at the risk of someone else coming in here and accusing me of being a grammar ninja let's peruse your post just a moment...
The words which I have boldfaced and changed to blue are glaringly inaccurate attempts at spelling the words you were attempting to employ. "stereo type" wasn't technically incorrect in its spelling but it was incorrect in its usage as it is a single word rather than two. I intentionally excluded your failure to properly punctuate various things and the use of "ur" rather than "you're" as they are all too commonly used in place of what actually belongs.
Should we continue this little back-n-forth we've got going or would you like to quit while you're *not* ahead?