Sam just smirked, still leaning close. "You think we want to be here? Seems you forgot the little fact that we're dragged here and left to fend for ourselves until this Serpent shows up and we help try and fight to save whoever we can... even bigoted assholes like you."
He let Dean do his own interjections, then pulled away. Dean was better at getting the information right now, because Sam was too far along in his anger that he just wanted to hurt things.
He'll just do that after Dean and Selina get the info they need.