The practicality of welcoming immigrants and refugees is debatable. Their arrival will change Buffalo's culture and economy. Time will tell if the changes are for better or worse.
The odd thing, however, is that many of us have decided that "practicality" is not always the best way to make a decision, because the right thing to do isn't always practical. And though it may or may not be wise (and that can be the subject of another post), a large portion of us have given authority to ancient writings from the Near East. We've even declared that these writings, the Bible, are inspired by God.
And the feeling expressed in these writings toward immigrants is clear. See for yourself:
"You shall not wrong or oppress a resident alien, for you were aliens