Why is roderigo ready to return home

Roderigo is ready to return home because he is fed up with Cassio and has gained experience and intelligence.

because of all the immigration, america became one big melting pot. the diversity of cultures from all over the world made america somewhat divided as well. people that immigrated stayed with their kind, and their traditions, while native born americans stayed with their kind and their traditions. normally, people born in american scorned the immigrants as well. the new religions also divided america. in summary, it took away from the american culture and identified america as the "melting pot."

yeah, i think its a good thing what do you think?