I love statistics.
The generosity index is from the people at the Catalogue of Philantrophy. It is computed by taking each state's average income and the state's charitable donations and then ranking them.
Turns out, red states do much better than blue states:
Now before conservatives get too excited about demonstrating their moral superiority, I would be interested in seeing a chart of the original data - that is, the average income per person per state. Because this may be heavily influenced by income.
Because this could just as easily be a table that proves that the more you tax people, the less they give to charity.