I'd argue it doesn't matter. If they offer e2ee email, they can't be aware of the content of any messages exchanged.
Unless they were informed one of their email accounts belonged to someone convicted of committing an actual act of domestic terror, they would be completely in the dark about who's using their email services.
Given its this US state department issuing the statement, I wouldn't believe any accusation leveled at all without proof. I'd need to see evidence that A/I knowingly provided services to a convicted domestic terrorist for me to believe this is anything other than trying to stamp out E2EE.
