They blamed violence on "poor whites" and said it had no political significance.
Those politicians were lying.
One was direct participation. Democratic leaders personally organized and committed violence.
Before he was elected to the US Senate, M. C. Butler took part in the 1876 Hamburg massacre.
This great article from @bdproctor explores coded, interstate communication bwn 2 brothers - both Klansmen & ardent Democrats.
The issue here wasn't "civility." 19th century politics were rude and raucous.
Whether they ever raised a hand in violence themselves, politicians legitimized terrorism by delegitimizing its targets.
And they happily reaped the benefits on election day. /x