Asperger's has nothing to do with being amoral or immoral. Asperger's people have trouble following certain more subtle social norms but that has little to do with morality.

Some of the biggest amoral criminals in the world have been very adept socially (think Goebbels or Bernie Madoff), while some people whose morality was always lauded were known to be socially awkward (e.g. Einstein).

So while Aspergers is a disorder it is completely wrong to equate it with lack of morality.