Pope Leo's views on immigration should be completely non-controversial. He says he is against open borders. Countries have a right to decide who enters. Mass immigration is a problem to be solved. People should stay in their own countries. But that if people do come, they should be treated like human beings with dignity. He also says if they come, they should learn the language and respect the laws.
But because people's brains are broken by American politics they cannot understand this nuance.