At first coke-heads would switch over but sales would drop off due to the way the drug interacts with ones system. Coke stimulates endorphins of happiness that meth cant create. Meth shrinks blood pathways and in return makes endorphins and other chemicals that hit the brain speed in fast yet this doesn't last. On Meth, the user eventually gets a high from lack of REM sleep, this causes, at the extreme, hallucinations and dementia.
Coke does none of this ( dont get me wrong, its bad stuff). Bin ladin assumes that all of western society is addicted to coke and porn. The man is a freak that uses isolated news articles as an excuse to kill people.