//"The man's motive is not yet clear //
There's a further section linked to in the article called "Why has Belgium's capital been attacked?"
Theory one is "unemploymen".
Theory two is the "anger when the government [banned] women from wearing a full Islamic veil in public".
So that's two plausible explanations.
But then, with a clear break from this nonsense and the "Nothing to do with Islam" orthodoxy we get:
"Many trace Belgium's problem with Islamism to its decision in the 1970s to allow Saudi Arabia to construct the city's Great Mosque. The Saudis also sent over a large number of imams to preach a hardline, Salafist form of Islam...Critics believe the Salafist influence, combined with a lax approach by authorities over a 20-year period, helped jihadism to spread".
It was a Salafist mosque, of course, which gave us the Manchester bomber. I wonder if Ms Rudd knew this, or, if she did, thought it relevant.