New class conflict

Trump has become unpredictably popular since the launch of his presidential campaign. He has got some extreme statements about Muslim, Mexicans and etc. His popularity shows there is a conflict between American locals and foreign migrants. Many developed countries have similar problems. Moreover, though China has few foreign migrants, it has conflicts between locals and migrants from other parts of China.  This sort of conflict is inevitable. Firstly, we cannot stop such migration, unless we do not want economic growth, as migration contributes to some of our economic growth. Secondly, providing locals with better infrastructures and a better welfare system may not mitigate the conflict, as it could attract more migrants who hope their future generations could benefit from the system. Thirdly, locals want to stay on their land, as they will understand the benefits of their current living environment. The only way to mitigate the effect of such conflicts is to narrow the wealth gap between different areas domestically and globally.