They're all crooked

WaPo:

Newly released documents in the Jack Abramoff investigation shed light on how the lobbyist secretly routed his clients' funds through tax-exempt organizations with the acquiescence of those in charge, including prominent conservative activist Grover Norquist.

It's long, but worth reading the whole thing to see which nonprofits might lose their tax-exempt status. Even if they hate taxes as much as Grover hates taxes, nobody's going to give money to his phony "nonprofit" unless they get a tax deduction.