This is exactly what happens with the young Muslims that grow up in Europe. They may live in whatever country, and speak its language and have its passport, but in their daily lives, they speak mostly Turkish or Arabic and are surrounded by Turks/Arabs and the main guiding ideology that informs their worldview isn't Christianity or secularism or cucked liberalism, it's Islam. And these second and third generations don't integrate at all, they become even more aware of their Muslim/non-European identity, being forced to live in what is essentially a foreign land to them, and practice Islam much more devoutly than their parents or grandparents did. And the devout version of Islam tends to explode.