Although Belisarius seems never to have been disloyal, Justinian was always fearful that so popular a commander might attempt to seize the throne, and he was always receptive to slanders circulated by the general's enemies.
The Native Americans had the idea that you couldn't own land, it belonged to the gods. Native Americans also had the idea of "Communalism" which is the idea that everything in the tribe could be used by the tribe. The Europeans had been owning land and purchasing it for private use for centuries and had a deep culture of land ownership dating well past the middle ages.