The Southern Poverty Law Center masquerades as a main stream organization with the credibility of an unbiased arbiter of what is hate. However spend five minutes reviewing the groups labeled as terrorist and/or hate groups by the SPLC and it becomes obvious it can only see fault in groups that are ideologically right.
The SPLC has called Catholic Charities a hate group. The SPLC has found Oath Keepers terrorists. Now the SPLC is telling Spotify what music is appropriate. link here