What does Mr. Browns visit to Okonkwo emphasize about relations between the ibo and the Europeans?

Soon after Okonkwo's return, Mr. Brown pays him a visit. He has sent Nwoye, now called Isaac, to the teacher's college at Umaru; Mr. Brown hopes Okonkwo will be pleased by the news. Okonkwo chases Mr. Brown away from his house, threatening the man with violence. Mr Brown's visit not only emphasizes his place in the community, but also the way he has been accepted amongst the people of the clan.