Why does jackson think that the speedy removal of the native americans is good for the united states

Jackson had always been for the removal of Native Americans from their tribal lands. He considered them beneath him and many Americans. Jackson thought he was doing the Americans a favor so they could claim the the land the Indians lived on. Much of it was already settled and American settlers would not have to tame the land, set up road systems. He was hoping that the overture would appease some of the people who were upset over Indian Wars and the land that was so "available". Jackson thought if he removed the Native Americans then there would be less bloodshed all around. 

The exchange of foods between the new and old worlds