“Men of energy of character must have enemies; because there are two sides to every question, and taking one with decision, and acting on it with effect, those who take the other will ofcourse be hostile in proportion as they feel that effect.”
— Thomas Jefferson (letter to John Adams, 21 December 1817)
Reference: The Writings of Thomas Jefferson (Memorial Edition), Lipscomb and Bergh, eds., 15:109.
But the modern liberal will tell you that if you disagree with them you’re corrupt, selfish or a liar. Disagreement with a liberal is taken to be prima facie evidence of poor character.