Suing the SPLC
The Southern Poverty Law Center suffered a well-publicized setback in the summer of 2018 when it agreed to pay $3.375 million to the Quilliam Foundation and its founder Maajid Nawaz for wrongly placing them on a 2016 list of "anti-Muslim extremists." Nawaz, a former Islamic extremist turned moderate, has been critical of Islamic extremism (for example, the ban on Muhammad depictions), and for this he was smeared by the SPLC.
This, of course, is a big deal since many powerful organizations including Amazon, PayPal, and Google use the SPLC to determine whom to ban, punish, or de-platform. As a result, being targeted by the SPLC can be devastating, especially if you're on the Right. The SPLC is a well-funded, mostly-Jewish, anti-white, Leftist organization which has no intention of following its own dedication "to fighting hate and bigotry and to seeking justice for the most vulnerable members of our society." It claims to be against extremism, racism, and hate, yet it engages in all three of these in order to fulfill its real purpose, the annihilation of the Right, especially the White Right.