If we take motivation into account (as the court did), does it change how you think she should have been treated by the court to know that she didn't keep a cent of the money herself, but spent it on giving food and clothes to homeless people, organising it herself rather than through a charity? She wasn't preying on the weak, she was misguided and trying to help society rather than get stuff for herself - and the law is supposed to be about protecting society.
Motivation is an important aspect of any crime, and prosecutors should be looking for appropriate sentences, not the harshest one they can make stick. Besides, his case is a focus point that gives an excellent chance to start looking for reform rather than sweep it under the carpet as 'business as usual' - because prison sentences in the US have exploded ridiculously in the past 20 years.