Immigration isn't only for an international context but can also be used for people that immigrate from one city to another. One can be xenophobic if one dislikes the idea of people moving where they live (be that for prejudice of other's culturies or for a belief that their home city will be worse due to immigration). People will always move where they please and using that as argument is just tiring. We need ways to regulate housing and stop people from profiting over it.