It turns out that the most generous funder of white supremacist groups in the United States was likely the Southern Poverty Law Center.  

At least that’s what the Department of Justice‘s superseding indictment against the SPLC alleges. The organization secretly paid informants to engage in the active promotion and funding of racist groups while denouncing and “fighting” the very same groups in public. The SPLC purportedly created fictitious entities to hide funding from its donors.