Money. Money is to the Tides Foundation and Center what water is to the tide. You can’t be sure from what source any part comes. You can’t be sure where any part goes. But it can knock you off your feet and pull you down. And there is an ocean of it. The Tides Foundation and its offspring, the Tides Center, effectively “launder” donor dollars when they give to other nonprofits. The San Francisco-based Foundation receives donations from individuals and foundations and then channels them to activist groups. The result is that the original donor can’t be linked to...