[Gamecock]

They were rattling off works, or their filthy rags as the reason for their salvation.

Not once do they claim to have had faith.

[Campion]

They were claiming to have done those works in Jesus' name, though, not in their own. Sounds like they at least pretended to have faith, or presented themselves that way.

And Jesus condemns them as "workers of lawlessness," not as "unbelieving".