He probably did provide it but it's entirely possible that HE didn't include it. I imagine that MND would ask his occupation etc to verify he's not a nut. I still don't see how the guy can be descriminated against for a personal view. Special interest groups want to silence all but their voices.
At my company, there are very strict policies regarding comments to the media in which the organization's name is used. I'd be very surprised if Allstate doesn't have the same kind of policy.
I submit he was fired for violating a policy.