Some questions that must be answered before you open your borders: How does this migrant group treat their own people in their own country? Have they created a high trust society, or do they routinely steal, scam, and kill one another? Do they have a functional government or warlords engaged in centuries-old tribal feuds. Does the country produce anything of value for the world? What is the average IQ of its citizens? Are these people who can come to the host country and be self reliant and financially independent? If structure fires and broken glass are what you get, then you already have your answers.