Migration exists. Get over it.
Are you prepared to tell working class families not to migrate in order to find work and benefit their families?
Capitalism is international.
World Labour is international.
Wages are lower in some parts of the world than it is in others.
Capitalists by their very nature will exploit this. So if there is a reserve of cheap surplus labour ,anywhere in the world, the capitalist will use it regardless of their nationality.
Whats the point of quoting stats. Just walk onto a building site in London or onto a farm in Sussex and you will see 'nationalist' employers flying the flag by employing cheap east european labour.Thatis your 'stats'.
Attack the capitalist , not the worker.