Let's remember that this poll has Obama more popular than Trump and Strange doing even worse than Moore. Tossup for now.
Pretty believable IMO.
Is it though? I felt Moore would outperform Strange in the GE prior to these allegations, but given the ~20 point swing away from Moore since then you'd have to think Strange wouldn't be impacted by nearly that much (though I'm sure Moore's conduct has driven voters to Jones regardless of the opposition).
I just don't see a world where Strange loses by 10 to Doug Jones in Alabama - I'd bet the difference there is Roy Moore supporters who would actually vote for Strange but say they'd vote for Jones in protest because they don't want Moore pushed out of the race.