Joseph Smith was blatantly racist. And a pedophile who married 14 year old girls and trafficked children into marriage to other older men. 

• Had black church members sealed as SLAVES to him for all eternity AGAINST THEIR WILL in temple ceremonies. 
• Denied black men access to the priesthood. The church continued this ban until 1978. (For context the RLDS, a break off church from the mormons, ordained black men in 1865, a century before the mainstream mormons got their shit together)
• Wrote scripture that taught that righteousness living makes your skin whiter and evil living makes your skin darker
• Taught black skin was a result of the curse of Ham and Cain
• Taught slavery was created by God as a result of that curse
• Taught slaves could not be baptized without their master's approval

The church has never reversed the sealing of Jane Elizabeth Manning James, a black woman, who was sealed as a slave to Joseph Smith. They've also never apologized.

Remove his portrait from this chapel immediately.