Kindly first present scientific literature to back your claim that DMT causes no physical or mental harm and is non-addictive in the form of double blinded, scientific trials.
Secondly kindly mention the source from where DMT is available for the common Muslim.
Thirdly consider the fact that it is hallucinogenic and powerfully too. A Hallucination means to see something that does not exist. Do you really think that a person who is hallucinating is free from the risk of physical/mental harm?
Why, even those around him are at risk from a hallucinating person. The Muslims are trying to get rid of tobacco brother and you are dragging in DMT.