Unless they wanted to delist an entire country for some reason it's the TLD servers they would need to go after, not the root servers. And yes, they could attem

Unless they wanted to delist an entire country for some reason it's the TLD servers they would need to go after, not the root servers. And yes, they could attempt to go after the TLD itself and not just the ISP's caching recursive resolver. This is why distributed, censorship-resistant domain resolution is so important. The Internet may be distributed and capable of routing around censorship, but the current DNS system is relatively centralized and thus vulnerable to attack.