Yes, immigrants drive down wages is the biggest issue. The second is if you bring in a large enough glut of 1 type of immigrant all at once (like refugees for a real world example) they can establish an insulated community and not actually join “the mixing pot.”
There are obviously a lot of positives and neutral points as well, but everything has a give and take. The biggest positive is that children are a pure drain on society but an immigrant doesn’t need schooling or rearing. They can simply begin working (for that lowered wage).


Fug 'em both.