Jesus, Christianity and Hell
We accept Christ as the Son of God, as God's empowered representative on earth, but not as the sole representative who has ever come or will ever come. The Supreme Person visits this world in many ways. Sometimes God sends His son, like Christ, but sometimes He comes Himself, as Krishna or Rama.
We accept Jesus' statements that he is the Son of God because he was representing God by engaging people in worshiping God. In the Bhagavad-gita, Krishna also promotes the worship of the Supreme Lord. Jesus did make a distinction between himself and God the Father. We accept that Jesus and God are two distinct personalities, but because Jesus was acting purely in the interests of God the Father, they are one in spirit.
It's important to understand that there is only one Supreme Being, and that He is so inconceivably great that He is seen and known from many, many different angles of vision and described in different scriptures in different ways. We have the greatest respect for any teachings that bring one closer to a clear understanding and knowledge of the Supreme Person, with the goal of developing a mood of loving service to Him.
Vedic literature provides extensive descriptions of various types of hellish environments which are designed to reform the conditioned living entities' tendency to exploit the material world unrestrictedly. More information on that in the Fifth Canto of the Srimad-Bhagavatam. Hell exists, but it's not eternal. For a limited number of sinful acts, a limited length of time in hell is given. Then one gets another life to try again.