Why wouldn’t they just use a conventional missile? Lmao
Very high altitude nuclear weapons are incredibly damaging to both satellites and electronic systems on the ground in a potentially very large area. See the Starfish Prime test, and its impact on what were at the time rare satellites in orbit (it disabled six of them entirely - a significant portion of what was in orbit at the time); I quote the article:
Starfish Prime caused an electromagnetic pulse (EMP) that was far larger than expected, so much larger that it drove much of the instrumentation off scale, causing great difficulty in getting accurate measurements. The Starfish Prime electromagnetic pulse also made those effects known to the public by causing electrical damage in Hawaii, about 900 miles (1,450 km) away from the detonation point, knocking out about 300 streetlights
If it's confirmed, it might be less about directly targeting satellites and rather about exploiting such an effect like that.
No idea; it's a wild guess anyhow; everyone with both nuclear weapons and space launch systems has been capable of this for decades (yet never has, apparently).