Its not the drug its self or the effects they cause, the fact is that
they are illegal and you can only obtain them by illegal means.

All drugs should be legalized and addicts should be given enough of
their drug of choice to maintain or wean them selves off if they choose
to quit. The billions of dollars we spend on the drug war could be used
for other means like more education on the effects of drugs.

Most violent drug related crimes are the ones over territory of drug peddlers
not the robberies committed by the user. So by eliminating the illegal drug
trade completely and making it a legal business it would decrease the
number of violent crimes related to drugs drastically.