I don't expect Islam to flourish in educated democracies. But it is not inconceivable that anywhere there are Muslim communities, that terrorism could be advanced.
Furthermore, as we saw in Palestine, democracy is no guarantee of a kinder gentler nation. A Christian democracy is.
So while the particular case of the British airline bomb plot doesn't illustrate the article's point. The point is well taken.
Islam flourishes by reproducing more than the citizens of the country in which they reside. They win by playing the numbers game over the course of generations. They're winning in the Netherlands, and the rest of Europe will soon fall to Islam.