Now what did Sweden, the ultimate First World welfare state, possibly do or fail to do, to "enrage" these "immigrant" "youths"? Other than be slow in submitting to their dominance in those sections of the capital city?
It's hard to fight to save civilization, when deracinated relativists forbid everyone from even naming the enemy. The go-to guy for more on this is likely to be the multi-lingual expatriate writer Bruce Bawer. His website is very 1995-ish, but watch his Front Page column, it'll likely be where he'll publish next.