Islamic migration has contributes absolutely nothing positive to Western countries - indeed, Islam has not contributed anything positive
to Muslim countries for at least half a milleannium.
Islam did what it did in the field of knowledge to justify itself at the light of the ancients. It has never done anything even in its so-called golden age to contribute to anyone else's civilisation let alone to the whole of humanity. The very idea is anathema to a Muslim mind steeped in Islam. Islam is not a universalist creed as Christianity is or as Western civilisation has been since antiquity. Islam is radically and doggedly two-tier, radically partisan and supremacist.
https://twitter.com/OnlineMagazin/status/1052965782991331329The Christians and the Jews were allowed to 'flourish' insofar as it benefited and served Islam. Even today Muslims are baying for the blood of a Christian simply because she drank from a cup on a hot day. That is the heart of Islam, that eternally strange, barbaric intolerance and petty rancour.
Post-war Islamic immigration has benefited no Western country - or any other non-Muslim country. The movement of Muslims into non-Muslim countries has brought only discord and degradation to each and every society that permitted it, Western or not.
Conversely, its exclusively Western ideas and technology that have made any development in Muslim countries possible. Those great and wondrous achievements of the Islamic mind have done absolutely nothing to lift Muslim countries out of poverty, tyranny, misery. All they do is keep them there.