Curse of Cain 

Way to Perfection, pg. 106; “President Woodruff, in his journal, records the words of President Young as follows:  The Lord said, I will not kill Cain, but I will put a mark upon him, and that mark will be seen upon the face of every negro upon the face of the earth; and it is the decree of God that that mark shall remain upon the seed of Cain until the seed of Abel shall be redeemed, and Cain shall not receive the Priesthood, until the time of that redemption. Any man having one drop of the seed of Cain in him cannot receive the Priesthood; but the day will come when all that race will be redeemed and possess all the blessings which we now have. – History of Wilford Woodruff, p. 351.” – Joseph Fielding Smith

Genesis 4:11, 15; “And now art thou cursed from the earth, which hath opened her mouth to receive thy brother’s blood from thy hand  15 And the LORD said unto him, Therefore whosoever slayeth Cain, vengeance shall be taken on him sevenfold. And the LORD set a mark upon Cain, lest any finding him should kill him.”

What kind of god would hate his creation in this manner?  

Where in the Bible does it say that Cain turned into a black person?

The God I worship cherishes me and the color He made me and my relatives!  Teachings like this are from the pits of hell and not from above where God resides. May He have mercy on those that are still caught in the snares of this evil.

Also take notice that this is a false prophecy. The Church allowed black people to hold the priesthood on June 1, 1978 and as far as I know, black people are still being born to this day.

Furthermore, the Bible gives no indication that Abel had any kids.