Perhaps, had Lincoln been the man so many think him to be, he might have had the guts to explain that when you watch your People starting to starve to death, something inside you 'snaps', especially when you've watched other horrific atrocities happening to them too, coupled with being told to eat grass by an inhumane human, making that combination lethal.

(please see film link above)..and images of the 38 hanged men ended up on an ornate tin of a brewery company(?!!?)(see link below)

Also, some of the bodies were dug up, very shortly after death and used for medical research by William Mayo, amongst others...

Below you can read what these 'civilized' people did to those they considered to be 'savages'

Taken from here:Wiki - The Dakota War of 1862


>>>Execution

One of the 39 condemned prisoners was granted a reprieve.[13]:252-259[17] The Army executed the 38 remaining prisoners by hanging on December 26, 1862, in Mankato, Minnesota. It remains the largest mass execution in American history.
Drawing of the 1862 mass hanging in Mankato, Minnesota.
Wa-kan-o-zhan-zhan (Medicine Bottle)

The mass execution was performed publicly on a single scaffold platform. After regimental surgeons pronounced the prisoners dead, they were buried en masse in a trench in the sand of the riverbank. Before they were buried, an unknown person nicknamed "Dr. Sheardown" possibly removed some of the prisoners' skin.[18] Small boxes purportedly containing the skin later were sold in Mankato.

At least two Sioux leaders, Little Six and Medicine Bottle, escaped to Canada. They were captured, drugged and returned to the United States. They were hanged at Fort Snelling in 1865.[19]
Medical aftermath

Because of high demand for cadavers for anatomical study, several doctors wanted to obtain the bodies after the execution. The grave was reopened in the night and the bodies were distributed among the doctors, a practice common in the era. The doctor who received the body of Mahpiya Okinajin (He Who Stands in Clouds), also known as "Cut Nose", was William Worrall Mayo.

Mayo brought the body of Mahpiya Okinajin to Le Sueur, Minnesota, where he dissected it in the presence of medical colleagues.[20]:77-78 Afterward, he had the skeleton cleaned, dried and varnished. Mayo kept it in an iron kettle in his home office. His sons received their first lessons in osteology from this skeleton[20]:167 In the late 20th century, the identifiable remains of Mahpiya Okinajin and other Native Americans were returned by the Mayo Clinic to a Dakota tribe for reburial per the Native American Graves Protection and Repatriation Act.[21][full citation needed]
Internment

The remaining convicted Indians stayed in prison that winter. The following spring they were transferred to Camp McClellan in Davenport, Iowa,[22] where they were held in prison for almost four years. By the time of their release, one third of the prisoners had died of disease. The survivors were sent with their families to Nebraska. Their families had already been expelled from Minnesota.
Pike Island internment
Dakota internment camp, Fort Snelling, winter 1862
Little Crow's wife and two children at Fort Snelling prison compound, 1864

During this time, more than 1600 Dakota women, children and old men were held in an internment camp on Pike Island, near Fort Snelling, Minnesota. Living conditions and sanitation were poor, and infectious disease struck the camp, killing more than three hundred.[23] In April 1863 the U.S. Congress abolished the reservation, declared all previous treaties with the Dakota null and void, and undertook proceedings to expel the Dakota people entirely from Minnesota. To this end, a bounty of $25 per scalp was placed on any Dakota found free within the boundaries of the state.[citation needed] The only exception to this legislation applied to 208 Mdewakanton, who remained neutral or assisted white settlers in the conflict.

In May 1863 Dakota survivors were forced aboard steamboats and relocated to the Crow Creek Reservation, in the southeastern Dakota Territory, a place stricken by drought at the time. Many of the survivors of Crow Creek moved three years later to the Niobrara Reservation in Nebraska...>>>

Standard Brewing Company 'commemorative'(?)tin of Mankato Hangings