The Democratic response to this is very clear and probably effective. Terrorize the legislators via Antifa stormtroopers showing up at their houses and burning them, killing family pets, terrorizing their children, blackmailing them, and, if they are still not amenable to appointing the Biden electors, killing the legislators and disposing of their bodies offshore.
This is a case where Federal officers should be assigned to defend state legislators in the fulfillment of their duties - when Antifa started getting shot in large numbers while attacking the families of elected officials, the optics for the Democrats would be so bad that even Soros would be screaming at them to stop.
Unfortunately I think you may be right.