That slaves were treated unfair than the rest of the citizens
The answer should be, "Shinto is a more flexible religion, so it doesn't conflict with Buddhism".
Ok so when the americans moved west, they built plantations and needed slaves for the plantations. In the east, however, the northern half wanted to free all of them.
REGULATIONS<span>Guidelines issued by federal agencies for administering federal programs and implementing federal law.</span>
Americans wanted to maintain a white, protestant nation