It is false that is gave cherokees permission to attack anyone who settled on thier land. The trail of tears actually were taken from thier land hundreads of miles to a reserve on the trail of tears.
The Reasons for the migration of the Bantu are not known but they most likely included the following, they moved due to the fear of famine, which broke out due to overcrowding and drought. The climate in their cradle land had become unreliable/unpredictable.
The Democratic Party has traditionally Liberal views