As this is written, almost a week after the event, the shooter in the Seattle shipyard is still at large, although tensions in the city have started to ease. Reports after the fact included the usual comments about such things happening in the US but not Germany. But now in Europe, such things do happen, even though gun ownership is strictly controlled. As in Honolulu, Seattle and Germany, officials were shocked and suggested such events were more American than Brazilian. And there were similarities.
Brazil has a high incidence of violent crime.
Of course, Brazil and Germany have very strict gun laws. So does, Hawaii-perhaps the strictest in any state of the country. Somewhere, there may be an explanation. Causes may be found. Guns are not it.