That wasn't Jean, though. It was Phoenix-as-Jean. The real Jean was recovering from injuries in a cocoon at the bottom of Jamaica Bay. Reconned before being published or not, that's the story. X-men history.
This latest "Scott's a dick" thing isn't the only reason Cyclops is disliked by a lot of X-men fans. He's been a dick for quite some time. I actually feel for the character. How is going to feel when, after the Phoenix Force leaves him, he recalls what he did? Remember, Scott insisted the PF be allowed to come to earth unopposed by the X-men, despite Tony Stark's stupid weapon that split the entity (I still find this event very bothersome).
Not that anything could have stopped the Phoenix, anyway.
Also, Dark Phoenix in X-Men #137 was on the verge of being lobotomized by the Shi'ar as punishment for her actions. "She" was saved from this fate by committing suicide. That's a pretty heavy price to pay - what price will Scott pay? And for that matter, what punishment awaits Namor, Colossus, Illyana, and the White Queen?