Well, I can try to give you an answer - my answer - but I believe it will not be a short one.
First of all: Europe had in the past decades again and again "waves" of people coming here, looking for a better live.
In the 60s, it was the Italians. And we all were warned that they will eat our cats, rape our girls and make extensive use of their knives. Nothing of all of this was true. Instead, they brought spaghetti, tortelloni, pizza - and prosperity, because they worked their asses off.
Then came Turks. We were warned how they will use pistols and change our culture, they would rape our girls and deal drugs. Nothing of all this was true - instead they brought kebab and other goodies, - and prosperity, because they worked their asses off.
Then came people from Sri Lanka. We were warned they would rape our girls, deal with drugs and change our whole culture. Nothing of this was true - instead they brought a lot of new food, and hundred of restaurants wouldn't have survived if these guys wouldn't have worked their asses off. You guess it: They brought properity.
In the 90s came people from the Balkan. Oh, how we were warned: They would - of course - rape our girls, steal everything, bring a new culture with a muslim background, this destroying our culture. Nothing of this was true - instead they brought new food, new drinks, new clubs - and prosperity.
It IS true, though, that with every group of these cultures came people who were not good. Who raped. Who stole. Who murdered. Just as it was before. Only that all the sudden, people started to ask "where do they come from".
Now let's look at the people from the Balkans. As a matter of facts, I was a lot in Kosovo, Kroatia and Serbia during the war. You can believe me: This war was different than everything you thought you'd see. It was the most brutal of all wars I had ever seen.
I was a volunteer to evac people from Bihac. I went there with my truck, just before Christmas 94, and loaded this truck with every"thing" I could: Kids, women, men, dead, alive, dying. In such a situation, religion never is an issue. The people need help, and that's the only thing you can offer at the moment.
Many of the people from the Balkan returned once they had the impression their home is safe. Others just became ordinary people. You wouldn't know that they orignially come from the east if you wouldn't know. They look like you, they talk like you, they are just like all of us. Most of them drink beer and other alcoholic beverages, but don't eat pig. That is, in most cases, the only way how you can tell they believe in something else than the majority here.
They are just like you and me - maybe a bit more patriotic than I am - but they are patriotic for MY country, the country they are living in.
Now there's the war in Syria. Have you ever had kids? Have you ever been in a war? Would you stay there with your kids? I understand that a lot of people come to Europe. And yes, this may be risky because some of the refugees are convinced that they have to install a state of war in our countries, too.
So what. I believe in me, in the people living here, in the people who come here, to fight those guys. Just this morning, my son's friend from Macedonia came by. He is muslim. We all were watching the latest news from Paris, he was crying, asking why these people are doing this.
Since I can remember, I fought neonazis.
If you talk to them and then talk to radical islamists, you'll see that there is basically no difference between them all. They have a wicked mindset, and they all are all but normal. We, our society, will be able to deal with it.
Terror means that they want to spread fear. They may, from time to time, be successfull with this. But I also remember how I, as a kid, was afraid to go to the shopping mall because of the Baader-Meinhof-Gang. But from a certain point on, I just decided that it is me who has to say where I go and where I don't - and not terrorists.
The same is true for today. I will fight every terrorist with all possible means - but hell, if someone is in need of a shelter, of a place which is safe, I'll do everything I can that this person gets it. Never looking at the color of the skin, the age, the sex, the religion. That is what makes us human.