In a letter that he wrote to Dr. Benjamin Waterhouse in 1822, Thomas Jefferson offered a fabulous description of “Calvinism.” In contrast to the teachings of Jesus, which are “simple, and tend all to the happiness of man,” he offers the five “demoralizing dogmas of Calvinism.”

That there are three Gods. That good works, or the love of our neighbor, are nothing. That faith is every thing, and the more incomprehensible the proposition, the more merit in its faith. That reason in religion is of unlawful use. That God, from the beginning, elected certain individuals to be saved, and certain others to be damned; and that no crimes of the former can damn them; no virtues of the latter save.

I strongly recommend emailing this to any Calvinists you know. They will really appreciate it.