Yes. The SPLC put reform Muslim Maajid Nawaz and anti-FGM campaigner Ayaan Hirsi Ali on their list of hate speech advocates until threatened with legal action by Nawaz.

Right leaning source: http://dailycaller.com/2018/04/19/splc-maajid-nawaz-muslim-e...

Left leaning source: https://www.nytimes.com/2017/08/24/opinion/southern-poverty-...