Republicans voted for and passed the Civil Rights and Voting Rights Acts. The democrats largely voted against both, but since LBJ was president I guess the WaPo people need to give all glory and honor to their own party.
LBJ, in his own words, regarding the "Great Society" scam:
"These Negroes, they're getting pretty uppity these days and that's a problem for us since they've got something now they never had before, the political pull to back up their uppityness. Now we've got to do something about this, we've got to give them a little something, just enough to quiet them down, not enough to make a difference... I'll have them niggers voting Democratic for the next two hundred years".