People have no idea whos going to heaven or hell
"Through Christ" can mean a million different things. Maybe you go "through him" in the afterlife and you are judged, like everyone else, by Him.
No just God is gonna through people into Hell for never having heard of His son. Anyone trying to tell you otherwise is a moron.
What of the people that go to Hell becuase they truly on an intellectual level feel that the story of Christ is not real. Well these very same people used the very brain and intellect given to them by God Himself to reach this conclusion so what fualt of theirs is it?