Immigration refers to the move to a country in which one is not native for a long term residence. 

Arguments in favor of Arguments opposing
It is to move to a foreign country.
Immigrants can help to provide exposure to other cultures around the world. Immigration may cause social or cultural conflicts within the society.
It is usually for long term residence.
Immigration to another country provides the immigrant with an opportunity to adopt a different culture. Immigration to another country can result in distance from immigrant's native culture. 

Competing Views...

Angela Merkel: "Germany is doing what is morally and legally required of it. Nothing more, nothing less [referring to the Germany's response to the refugee crisis in 2015].", Deutsche Welle, [URL]

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