I think your observations are correct. There are some differences between the U.S. and Europe that may explain it: i) the U.S. is protected by two vast oceans,

I think your observations are correct. There are some differences between the U.S. and Europe that may explain it: i) the U.S. is protected by two vast oceans, and Canada and Mexico were never a threat. By contrast, Europe has been under siege by Islam various times, starting with the conquest of the Iberian peninsula in the 8th century, to fighting the Otomans in the East for various centuries. Mass immigration feels more like an invasion in this case. ii) the U.S. is much more multicultural and multi-ethnic than each specific European country. There's enormous variety as a whole in Europe, but each country tends to have its own identity. Sweden, for instance, is one of the least genetically diverse countries in the world. iii) in Europe, Church and State tend to be more separated. Some years ago, Germany's federal government wanted to ban Christian crosses from Bavarian public schools, as it violated the law, and there was huge outcry. Now they do the same to Islamic veils, and people say it's Islamophobia. The truth is: the law applies to all, and Muslims, if they are citizens, must abide and do not deserve special treatment. In the end, there's also the arrogance and pride. Europe did rule the world for centuries. Now the U.S. is in charge, but we still feel like we know better. We certainly are not going to adopt the cultures of Muslim immigrants who come to Europe because their countries are failed states. We know better than all, so whoever comes to Europe either plays by our rules or can go somewhere else. It's a bit strict, but it's fair. It applies to all, regardless of religion and ethnicity.