And then I took a stroll in the woods, and felt vaguely ashamed at the ease with which I was willing to hand a small victory to his enemies. After I saw off the Islamic enforcers in my own country, their frontman crowed to The Canadian Arab News that, even though the Canadian Islamic Congress had struck out in three different jurisdictions in their attempt to criminalize my writing about Islam, the lawsuits had cost my magazine (he boasted) two million bucks, and thereby “attained our strategic objective — to increase the cost of publishing anti-Islamic material.” In the Netherlands, Mr. Wilders’ foes, whether murderous jihadists or the multicultural establishment, share the same “strategic objective” — to increase the cost of associating with him beyond that which most people are willing to bear. It is not easy to be Geert Wilders. He has spent almost a decade in a strange, claustrophobic, transient, and tenuous existence little different from kidnap victims or, in his words, a political prisoner. He is under round-the-clock guard because of explicit threats to murder him by Muslim extremists.

Yet he’s the one who gets put on trial for incitement. In 21st-century Amsterdam, you’re free to smoke marijuana and pick out a half-naked sex partner from the front window of her shop.

And, although Mr. Wilders was eventually acquitted by his kangaroo court, the determination to place him beyond the pale is unceasing: “The far-right anti-immigration party of Geert Wilders” (The Financial Times) . . . “Far-right leader Geert Wilders” (The Guardian) . . . “Extreme right anti-Islam politician Geert Wilders” (Agence France-Presse) is “at the fringes of mainstream politics” (Time) . . .

Mr. Wilders is so far out on the far-right extreme fringe that his party is the third biggest in parliament. Indeed, the present Dutch government governs only through the support of Wilders’ Party for Freedom. So he’s “extreme” and “far-right” and out on the “fringe,” but the seven parties that got far fewer votes than him are “mainstream”? That right there is a lot of what’s wrong with European political discourse and its media coverage: Maybe he only seems so “extreme” and “far-right” because they’re the ones out on the fringe.

And so a Dutch parliamentarian lands at Heathrow to fulfill a public appearance and is immediately deported by the government of a nation that was once the crucible of liberty. The British Home Office banned Mr. Wilders as a threat to “public security” — not because he was threatening any member of the public, but because prominent Muslims were threatening him: The Labour-party peer Lord Ahmed pledged to bring a 10,000-strong mob to lay siege to the House of Lords if Wilders went ahead with his speaking engagement there.

Yet it’s not enough to denormalize the man himself, you also have to make an example of those who decide to find out what he’s like for themselves. The South Australian senator Cory Bernardi met Mr. Wilders on a trip to the Netherlands and came home to headlines like “Senator Under Fire For Ties To Wilders” (The Sydney Morning Herald) and “Calls For Cory Bernardi’s Scalp Over Geert Wilders” (The Australian). Members not only of the opposing party but even of his own called for Senator Bernardi to be fired from his post as parliamentary secretary to the Leader of Her Majesty’s Loyal Opposition. And why stop there? A government spokesman “declined to say if he believed Mr Abbott should have Senator Bernardi expelled from the Liberal Party.” If only Bernardi had shot the breeze with more respectable figures — Hugo Chávez, say, or a spokesperson for Hamas. I’m pleased to report that, while sharing a platform with me in Adelaide some months later, Bernardi declared that, as a freeborn citizen, he wasn’t going to be told who he’s allowed to meet with.