Scandinavia and the World

Comments #9587726:

Bye bye ambassador 30 1, 7:20am

[How many of people who've come to the US as refugees turned out to actually be extremists in any way? How many of those has actually gotten through immigration?]

That is not the right question setup.
One should ask whether immigrants differ statistically from locals ("natives") by any category or subset of categories. If there is a difference, then there will eventually be problems.