Thanks for the link. Interesting, but nonsense. The author needs to buy a globe.
I am a bit rusty with this, but hypersonics are mostly hype. Because physics.
The author suggests a missile called Kenzhal is a risk. Nope. The article states it's range as 2000km. Not enough for a polar route. Far East Russia to Alaska yes, but not polar. The other one named is Oreshnik, claimed range of 5500km. That's the distance from London to NY. Using DD's school globe and a piece of string, that could reach the US from the Russian far east, over Alaska. Nowhere near Greenland. If fired from the west of Russia, the Baltic sea area, then it goes over Greenland, but would land in the middle of Canada. Nowhere does my 5500km long bit of string get anywhere near the US by going over Greenland. If fired from China, a missile with that range would plop in the sea, or Russia. It would not even reach Greenland, never mind the other 5000km from the top of Greenland to the USA/ Canada border area.
That would need at least 8000 km range. And that incidentally is where the range of ICBM nukes start. That is why they start at that sort of range, because that's the minimum needed.
Then there is payload, and physics. Hypersonics can't carry much weight. So the damage they do against land targets, especially hardened ones, is minimal. We see this in Ukraine. We also see from that war, that what Russia claim are hypersonics are actually not. They are ballistic missiles with less payload.
Hypersonics are really a danger against ships. Short to medium range, where a small payload could do enough damage to disable it. Think South China sea and Taiwan area. They can't do intercontinental range because they fly against air resistance. They can't carry enough fuel. And that is why ICBMs exist.
ICBM's dont have air resistance for most of their flight of course, and they also go really fast. About Mach 17. Their speed comes from gravity and freefall. They can go over Greenland and reach the US, and that is exactly what Thule is watching for.
I reckon this military analyst author is rather full of hype.
The author also managed to miss out the real risk. Submarines.
:-)