“I love the pure, peaceable, and impartial Christianity of Christ; I therefore hate the corrupt, slave-holding, women-whipping, cradle-plundering, partial and hypocritical Christianity of this land.”

The Government of Christ a Christocracy (1804)
Context: The fondness of magistrates to foster Christianity, has done it more harm than all the persecutions ever did. Persecution, like a lion, tears the saints to death, but leaves Christianity pure: state establishment of religion, like a bear, hugs the saints, but corrupts Christianity, and reduces it to a level with state policy. (p. 278)

As quoted by William Rees-Mogg in The Times [London] (4 April 2005) {not found}. Gandhi here makes reference to a statement of Jesus: “No servant can serve two masters; for either he will hate the one and love the other, or else he will be loyal to the one and despise the other. You cannot serve God and mammon." (Luke 16:13); also partly quoted in Christianity in the Crosshairs: Real Life Solutions Discovered in the Line of Fire (2004, p. 74 books.google http://books.google.de/books?id=I7_5OM2VWuMC&pg=PA74) by Bill Wilson.
A variation is found in Bombay Sarvodaya Mandal & Gandhi Research Foundation's website mkgandhi.org http://www.mkgandhi.org/africaneedsgandhi/gandhi's_message_to_christians.htm. Christian missionary E. Stanley Jones, who spent much time with Gandhi in India, is said to have askedː “Mr Gandhi, though you quote the words of Christ often, why is it that you appear to so adamantly reject becoming his follower?". To this, Gandhi is said to have repliedː “Oh, I don’t reject your Christ. I love your Christ. It is just that so many of you Christians are so unlike your Christ”. Jones would write a book called " Mahatma Gandhi: An Interpretation https://archive.org/details/mahatmagandhiani000019mbp" (1948), where he included excerpts of his personal correspondance with Gandhi, but he did not include this conversation.
No further sources for Gandhi have been yet found; but a similar quote is attributed to Bara Dadaː "Jesus is ideal and wonderful, but you Christians -- you are not like him." Source - Jones, E. Stanley. The Christ of the Indian Road, New York: The Abingdon Press,1925. (Page 114)
Disputed

"The Brooklyn Divines." Brooklyn Union (Brooklyn, NY), 1883.

Christian Missions: A Triangular Debate, Before the Nineteenth Century Club of New York (1895)

On religion

Letter to Benjamin Rush (12 April 1803) http://www.positiveatheism.org/hist/jeff1122.htm
1800s, First Presidential Administration (1801–1805)
Context: To the corruptions of Christianity I am indeed opposed; but not to the genuine precepts of Jesus himself. I am a Christian, in the only sense he wished any one to be; sincerely attached to his doctrines, in preference to all others; ascribing to himself every human excellence; & believing he never claimed any other.

"What Do I Want?"
1850s, Attack upon Christendom (1855)

The Divine Commodity: Discovering A Faith Beyond Consumer Christianity (2009, Zondervan)