Turkish thug Erdogan also claims to have warned them.
So it would be irresponsible not to ask why they would have allowed attacks in Belguim. NATO has a half-century history of using false-flag terror to manipulate European citizens into action, known as OPERATION GLADIO.
Brussels is where the headquarters of the European Union is seated. The EU in currently in danger of breaking apart if it cannot find a reason to come together…
While Russia has entered the war in Syria and made significant gains, there is still an opportunity for the NATO bloc to invade under the pretext of “fighting ISIS.” But you need a decent provocation from ISIS in order to sell a war of aggression at home.
That’s the most plausible scenario that I can figure, as of today. They let it happen. It will be the cassus belli for Europe to invade Syria.