Answer:
The quote "those whom it would affect having forfeited those rights by proving false to their country, to humanity and religion" is referring to individuals who supported or participated in the Confederate rebellion during the American Civil War. The quote is from the Emancipation Proclamation, which was issued by President Abraham Lincoln on January 1, 1863, and declared that all slaves in Confederate-held territory were to be declared free. The Emancipation Proclamation was a major milestone in the fight against slavery in the United States, as it paved the way for the eventual abolition of slavery through the 13th Amendment to the US Constitution.