Check out this video, go to 34:54 and see Rabbi Singer's response. Why, if Judaism does not believe in an eternal hell, would he say such a thing? Also, his answer brought up a question in my mind. How does Rabbi Singer know that a Jewish Christian will go to hell? How about the Jew who was ignorant his whole life, ended up in Virginia, never met another Torah observant Jew, lives a very moral, altruistic life, and due to his circumstances is a Baptist? This guy goes to Gehinom and loses his share in the World to Come? I thought Hashem didn't punish people who sinned out of ignorance, and that they were treated halachically as abductees and forced, in a sense, to do the "sins" that they are doing! This matter is very personal to me as I have Christian siblings, and Christianity was what was taught to them.