> "Researchers call for development of anti-satellite capabilities including ability to track, monitor and disable each craft / The Starlink platform with its thousands of satellites is believed to be indestructible"
"Easy to bring down" vs. "believed to be indestructible"—some tension there!
If you're talking about nuclear weapons, their major effect on satellites (Starfish Prime as the reference point) isn't EMP effects, but ionizing radiation—creating a persistent radiation belt of MeV electrons. (A physical process that took months to disable some satellites). Beyond that I don't know much.
Not feasible. That would entail putting shrapnel into orbit (unlike extant anti-sat weapons which are short-range suborbital), which would mean a full orbital launch for every satellite target orbit. There's hundreds[0] of Starlink orbital groups already, so that'd require hundreds of independent orbital launches in a short timescale—far beyond China's launch capabilities today.
(On general principles, you could argue you'd need 1:1 launch vehicle parity (number, not payload) to defeat a satellite constellation this way. For each satellite launch, you'd need one corresponding anti-satellite launch into that same, newly-defined orbit).
If you make a dense-ish cloud that cuts across the Starlink orbits you'd eventually intersect them all if you could make the artificial debris field last It wouldn't require that many different counter orbiting fields to cover most of the orbits.
For your shrapnel to hit the satellite, it needs to be at the same height and inclination. Otherwise, your shrapnel will likely miss the targets.
Starlink satellites are pretty low and experience a lot of drag, with square-cube law working against you. Your shrapnel's orbit will likely decay pretty rapidly.
Relevant, Chinese domestic media reporting on China's own perspective:
https://www.scmp.com/news/china/science/article/3178939/chin... ("China military must be able to destroy Elon Musk’s Starlink satellites if they threaten national security: scientists" (2022))
> "Researchers call for development of anti-satellite capabilities including ability to track, monitor and disable each craft / The Starlink platform with its thousands of satellites is believed to be indestructible"
"Easy to bring down" vs. "believed to be indestructible"—some tension there!