They where "massive" by Swedish standards, but tiny by any international standard you may care to use. Certainly much much smaller than riots that have happened recently in many other European countries
Every place has problems. E.g. Sweden is consensus oriented and has only one officially accepted opinion at a time, so much stuff just can't be discussed. This along with being a small duck pond (the elites, media etc generally know each others) means that problems might be a long time being corrected.
country X has political support for some sort of bad thing Y, therefore I will never visit country X.