UPDATE 23 Oct 2018:
The post is clearly wrong. It was Mark Twain, not Jefferson, who wrote this about Christianity.
See this: TwainQuotes.com
Thomas Jefferson (1743 – 1826), the third President of the United States (1801–1809), the principal author of the Declaration of Independence (1776) had this to say about Christianity —
“There is one notable thing about our Christianity: bad, bloody, merciless, money-grabbing and predatory as it is – in our country particularly, and in all other Christian countries in a somewhat modified degree… Ours is a terrible religion. The fleets of the world could swim in spacious comfort in the innocent blood it has spilt …The gospel history of Jesus consists of fabrications,superstitions and fanaticism… I consider the book of Revelation, the ravings of a maniac…. Due to Christianity, millions of innocent men, women and children have been burnt alive as witches.”
Postscript: Pankaj Narula has cast doubts in a comment below on the authenticity of the quote. It appears to be a composite quote. I will do a follow up on this post in a short while. I regret the error.