When gray-haired white liberals take to America’s streets for “No Kings” protests, the only danger they’re exposing themselves to is ridicule.

But what happens when progressive protesters head to a foreign war zone?

Last weekend, the “Global March to Gaza” found out.

Thousands came from wealthy European countries like Ireland and Luxembourg, joined by activists from the developing world as well.

They planned to get into Gaza through Egypt, evading Israel’s blockade — but it was the Egyptians who stopped the marchers.

It turns out the locals did not take kindly to strangers involving themselves in the life-or-death politics of the neighborhood.

Egyptian authorities confiscated passports and phones, arrested some of the marchers and gave them all the chilliest of receptions despite the desert heat.

Nor were the police the only ones giving the wealthy white would-be saviors of Palestine a hard time — throngs of ordinary Egyptians shouted abuse and tussled with the clueless do-gooders.

In Gaza itself, the marchers could have suffered far worse.

A similar effort is already in serious trouble hundreds of miles away: 1,000 protesters from North Africa are held up in Libya, where France24 reports they have “no access to food, water or medicine and communications severely disrupted” and organizers say they are under “systemic siege.”

Those pro-Palestinian activists hail from places like Algeria, Mauretania, Morocco and Tunisia — now imagine the pasty faces from the “No Kings” crowd in that situation.

Egypt seems almost like Madison, Wis., by comparison — and Gaza makes even Libya seem tame.

Getting packed onto buses and deported from Egypt is the kindest thing that could happen to European leftists trying to tour a war zone.

Protests are inane enough in the West, but when Antifa isn’t around and they don’t devolve into riots against law enforcement, they’re a safe recreational activity for liberals who want to pretend they’re “doing something.”

Yet outside the comfortable confines of the Western world that such protesters denounce as intolerably unjust, pastimes like theirs can and do get people killed.

Perhaps, back home in places like Luxembourg, a few of Gaza’s self-appointed European paladins will reflect on how lucky they have it?

Maybe instead of protesting against immigration restrictions, they’ll even give thought to making sure Europe doesn’t become more like Egypt or Palestine?

No — don’t bet on that.

It’s a basic psychological trait of the Western progressive that he (or she, or whatever the pronoun) believes both that the West is the guiltiest, most racist, most imperialistic part of the world, and that Westerners like him (or her, etc.) understand exactly what the rest of the world needs — and are just the people to deliver it.

Western progressive morality is the most imperialist thing of all, especially when it’s posing as anti-imperialist or “anti-colonial.”

And when people like the Egyptians, who actually know a thing or two about suffering imperialism — and at times perpetrating it, too — tell Europe’s or America’s wannabe white messiahs they aren’t welcome, how do the protesters react?

Instead of singing a merry “99 Bottles of Beer on the Wall” on the bus taking them away to be deported, they can be heard in a video shared on X chanting, “F–k you, Israel! F–k you, Egypt!”

How dare Egyptians deport such well-meaning progressive imperialists! 

It’s as if they think it’s their country and they get to set the rules, no matter what enlightened Europeans feel about it.

The Egyptians have the best of reasons not to want Europe’s most naïve leftists marching through their territory on their way to Gaza.

Egypt can’t afford to make an enemy out of Israel at a time when Israel is dealing forcefully with enemies.

And Egypt can’t take in an influx of Gazans without making Gaza’s problems, including Hamas, its own.

But liberal meddling knows no bounds or borders, and the self-righteous progressives who want the world’s population to come to the United States and Europe also want the world’s government to cater to their WEIRD values — that is, “Western, Educated, Industrial, Rich and Democratic.”

The WEIRD-os are wrong when they’re out on the streets of America’s cities.

And they’re dead wrong when they interfere in foreign crises they don’t understand — though thanks to the Egyptian authorities they now hate so much, at least this bunch isn’t simply dead.

“No kings” is an old-fashioned message; today what we need is no more royally entitled protesters.

Daniel McCarthy is the editor of Modern Age: A Conservative Review and editor-at-large of The American Conservative.