Biden working with SPLC is no surprise. It is war against DEI opponents now. If you oppose DEI then you are a terrorist.
The FBI used the SPLC in its attack on the Catholics. It might sound like a joke but check out the SPLC’s labeling the Singing Nuns as a hate group. Look it up.
Working in concert with the SPLC would seem to be the wrong approach to any kind of reasonable solution. This would be like having some legitimate church group working with Hamas to accomplish a Christian charity of some sort.