Ice makes you believe you are physically indestructible and innately focuses your energy to prove that to be true - unlike any other drug. Therefore when used by those with violent tendencies, or the-world-hates-me attitudes, or revenge oriented people, it wreaks havoc.
Don't underestimate it. Very destructive. IMO, it would be an order of magnitude greater than alcohol for violence on a per user basis, where all other drugs would not.
