I was last time in Brussels 2.5 years ago on my way to Prague. It was one of the many visits I had in Belgium, but one thing that struck me immediately back then is how this city felt like the Middle East. I was pretty much only the white guy there walking with a laptop bag. I did not feel safe. The airport is even worse. When I waited for a flight to Prague, I was surrounded by gypsies and whatever strangely looking existence, where someone tried to rip a laptop from me.I was glad to leave.
After Paris attacks, it was clear that something else is brewing and Brussels was mentioned multiple times that it is a hotbed for terrorist attacks. There were several arrests of French and Belgium citizens with ME descent who were smuggled weapons from Ukraine into Schengen zone via Slovakia and Poland. This will be very difficult summer as European LE do not have government backing to deal with the crisis. The liberals will try to sweep everything under the carpet.