Belgium, the Antwerp port is the main entry point for drugs in Europe, and there is high demand for drugs in Belgium itself as well. The gangs used to be 'quiet' but there's been a drive-by shooting wave in Brussels recently, which re-opened the debate about what to do with all this.
I know the situation is in no way comparable with what's going on in South-America, but there are also well known spots in the city where drugs are dealt openly, people even queue, which is a bit of a wtf
Of course the extreme right is riding on this hard and winning a lot of popularity as a result