I'm not sure what you're getting at. What I mean is it makes people a better person by be more compassionate and so you're less likely to be prejudice and bias towards other people...and so be able to see the truth. It's like the candle light on the wall story.
Sorry, no.
I have plenty of compassion for my fellow human beings, and I don't believe in any deities at all. If the only thing that makes a person have compassion is the fear that they'll be tormented for all eternity otherwise, then I would suggest that such a person is, intellectually, a stunted and insensitive child with no conscience or independent thoughts of their own.