Twinkies and MDMA? That is one overstretched analogy.
I stated it was no excuse. The effects of serious drug abuse, though, are factors in the commission many crimes.
MDMA ("ectasy") is a high potency amphetamine compound that can cause amongst other types of permanent brain damage: brain hemorrhages, stroke, psychosis, hallucinations, a paranoid state, and irreversible cognitive impairment, in addition to its extreme addiction potential. In short, over time (and sometimes it's a short amount of time), it can turn your brain into toast. It can also result in irreversible damage to the heart and cardiovascular system. Amphetamine addiction can be an especially stubborn problem, and only a very motivated patient placed in a comprehensive, inpatient chemical dependency treatment program is likely to succeed in escaping the ravages of this especially dangerous drug. Any sane person would obviously advise anyone using it to stop, but this is obviously not an easy thing to do.