You brought up a point that I find quite interesting, regarding working to better integrate foreigners. Assuming that this event was an act of terrorism, and that it isn't of domestic origin, and that the motivation is based on idiology and history, the individuals likely arrived with the intention of causing harm from the beginning. In this case it is incredibly unlikely that any amount of integration with the local culture would change the outcome. It is very difficult, and often nearly impossible, to change deeply rooted beliefs, especially ones that people are willing to kill and die for. I'm not saying that it would hurt to try though, since there would certainly be other benefits that would come along with making it easier to assimilate when trying to start a new life in a new and strange place. And yes, the typical media coverage usually stirs up more panic and hysteria than necessary, which can lead to emotional and sometimes tragic actions being taken by individuals or groups that just enforce harmful stereotypes and perpetuate the cycle of hate and violence.