But they are a problem. One that the host country needs a solution to before accepting them in and letting them loose. Whether that is by having a long term plan to hold and then return them home, or having a system in place to acclimate them in.
Migrants are absolutely a problem, and a host country does need to solve that problem before brining them in. There's no reason to return a migrant home, you just don't take them if they might not assimilate.
But they are a problem. One that the host country needs a solution to before accepting them in and letting them loose. Whether that is by having a long term plan to hold and then return them home, or having a system in place to acclimate them in.
Which is the issue most are failing to achieve.
Migrants are absolutely a problem, and a host country does need to solve that problem before brining them in. There's no reason to return a migrant home, you just don't take them if they might not assimilate.