They lost me at the point where they said that migration is more dangerous than staying in a warzone. From a libertarian publication (albeit one that claims a "Confederate" ideology) I find their overall editorial on the subject a little odd.
They said that it's more dangerous than staying in the first "safe" country they come to (most of them are in Turkey, Lebanon and Jordan). That could be debated, also, since there were stories of abuse in Turkey, for example.
Austrian School economists are against the welfare state in general, though; notice they also point to the needless bureaucracy and expense of asylum applications and the strange situation of migrants granted asylum or (temporary or otherwise) residency still not being allowed to work freely in the EU. Namely, it's very counter-intuitive and self-sabotaging to make it so attractive for migrants to come, but to make it so difficult for them to actually make a contribution unless they meet certain criteria ("brain drain"). The author suggests making it less attractive (no welfare) and much easier (no red tape), and the issue will sort itself out.
“It’s all very well to have a compassionate, multi-cultural vision in principle, but in practice we do not seem to know who is among us, and whether they share our values."
http://www.telegraph.co.uk/news/wor...gger-through-the-heart-of-liberal-Europe.html
From the "Mises" source a few posts up, "economic migrants" are unlikely to share our values when those values are being distorted and mis-sold to them by people-smugglers; for example they quote costs per person instead of benefits actually received and underplay the reality of the often temporary nature of their stay in the target country... To what benefit to the smugglers, I don't know.
The point of a multi-cultural society is that your neighbour probably doesn't share your values. But such differences exist regardless of mixing cultures (or "classes"...) or not, and in the extreme just the same. (The source of the extract you isolated is the Henry Jackson Society, which is apparently "neo-conservative" in the US definition - time to educate myself.)
I'm personally more concerned whether these attacks have been facilitated with arms sourced from within the EU, as was the case with the Charlie Hebdo shootings.