The article says nothing about the Court accepting this. Why would it? What is the federal interest in it?
Of course the claims made are entirely correct but there is no "there" there.
The Supreme Court is not going to "hear" this case.
Someone filed a paper with the Court asking it to hear his claims against the Democratic Party to demand an apology for slavery. The odds that the Court will do anything with this paper except stamp it "denied" are exactly zero.
No "there"?
Hundreds of thousands, if not millions of Republicans have been slandered with the label of racism for decades. Elections have been turned, campaign monies lost, all based on lies.
People's lives have been negatively affected for generations and many, many people have died because of Democrat racism.
Is that enough "there" for you?