[chaosagent]

Yes, but note the article refers to hitting the missile DURING the boost phase, not at the end.

And spinning an ICBM during boost is much more difficult now than it was in the early days.

Trying to spin missiles not designed to be spun would cause mucho problems with the new forces now exerted on the vehicle, flame flow thru the nozzles, etc.

It would probably be necessary to redesign the vehicle from scratch.

[Wonder Warthog]

Nope, wrong. The only thing it might effect is a liquid-fueled rocket due to centrifugal forces on the fuel tanks. Solid fueled boosters won't be effected.

The key point is that doing a design that allows spin works from KNOWN TECHNOLOGY. Nothing new has to be developed or invented.