Here's Abe, the consumate moderate anti-slavery man, referencing the abolitionist Radicals in his Party in 1863:

They are nearer to me than the other side, in thought and sentiment, though bitterly hostile personally. They are utterly lawless -- the unhandiest devils in the world to deal with -- but after all their faces are set Zion-wards.

Credit due to Jason Lefkowitz for the truly illuminating quote.

I don't think I have much of the devil in me. But I get the point.