That's part of the problem right there that people segregate into enclaves and have little contact with each other's communities.

Meanwhile, people are dying. That is exactly how some people see it, and exactly how I see it. I'm not emotional, I'm logical, and I expect government to protect us from evil individuals/groups. Arguably, it's not there to foster some sort of "long-term" sustainable co-existence between different cultures.

First, you establish security and root out potential problem groups. And once that's happened, and you have almost non-existent danger to the local populace, then you can start worrying about integration and grey-goals such as "peaceful coexistence" and "de-radicalization". And I don't say that as a means to single-out immigrants, or foreign groups. This reasoning should apply just as much to dangerous elements that are within, and part of society currently.