I agree that advocacy groups shouldn't be charitable, that seems pretty similar to political activities that are already disallowed. Not sure about about 'when

I agree that advocacy groups shouldn't be charitable, that seems pretty similar to political activities that are already disallowed. Not sure about about 'when people disagree' thing (requiring majority consensus for public goods). It's easy to see this going both ways, in some places politics will disfavor religious groups, in other places it will disfavor birth control, LGBT groups, etc. I think it's OK to encourage public goods overall without requiring consensus (but not counting things that might be zero-sum like political advocacy as public goods).