The reason? Simkins was not only a legal educator at UT from 1899-1929. He and his brother were members of the Ku Klux Klan during a period in which it terrorized black communities through lynchings and shootings and dozens of murders.
And if the guy boasted about it in print .... what then?
They sure were. Like Jews and Catholics.
From the offered quote, this Simkins character seems like a particularly cowardly and despicable example of a Democrat.