This is a spoof of the Chick Tract "Why Should I?", the original of which can be found here.
In this Chick Fantasy Tract. we learn that you have to force yourself to believe religious nonsense if you don't want to burn in Hell for all eternity.
Additional Note: Jack Chick focusses on some of the more preposterous aspects of the bible in this one. Many of his claims are not even backed up by the bible. It's very hard to write a spoof on what already seems to be a joke.
*Pascal's Wager: see here.