The Bible does not agree with the modern view that there are many acceptable ways to worship God. A few Scriptures show this: Ephesians 4:5 says there is "one Lord, one faith".  Matthew 7:14 says "narrow is the gate and cramped the road (italics mine) leading off into life, and few are the ones finding it".  Matthew 7:21 says "not everyone saying to me, 'Lord, Lord' will enter into the kingdom of the heavens, but the one doing the will of my Father who is in the heavens will." (italics mine) In order to DO the will of God, we have to know what it is by taking in knowledge as John 17:3 tells us.  Then we have to apply what we learn.  Once you know what the will of God is, examine the teachings AND practices of a religion to see if it's teaching the truth from the Bible. Then you'll know if you are on the one road to life.

Regarding a burning hell, you might reason this way - what would you think of a parent who held his child's hand over a fire to punish that child for doing something wrong? Well, the Bible at 1 John 4:8 says "God is love", so if it a loving human parent wouldn't punish their child by fire, would it be reasonable to conclude that we would expect our loving God not to do so either. Ecclesiastes 9:5 says "the dead are conscious of nothing at all...", so the dead experience no pain.