Nomads have traditions. Movement is not antithetic to consistency. Nomadic life is organized around a few principles that ensures the survival of their lifestyle. Hospitality is one of them.
A nomad does not exist without other nomads. When a nomad welcomes another nomad in his tent, he sustains his own mode of existence. Similarly, collective ownership and exchange are the conditions of nomadism.
Nomads do not posses the land that welcomes them, thus they are not greedy with it. The life of movement requires a networks of friends and oasis along the way.