people should only believe in religion when they die?

There is nothing in the earthly portion of our life, more important than preparing for the eternal portion of our life. Life on Earth is just a momentary experience before entering eternity, during which time we choose where we will spend eternity.

By then it will be too late.  Real repentance takes time and effort and trust me, you don't want to die in your sins.

Why ruin a good death?

What?  It's too late when you are dead.  We have to ask Jesus for forgiveness and accept Him as Saviour NOW in this life.  We need to follow Him and obey Him in this life.

What good is it to try to get into His kingdom which He's already sent you to Hell?  You need an attitude change.

Uh . . . . . . . . WHAT???

When you're dead you can't do anything see Ecclesiastes 9:5, 6 and 10. however all in God's memory will be resurrected, see John 5:28, 29; Romans 6:7, 23.

People shouldn't be religious at all, and just deal with what is.  That's difficult enough without making up extra problems that only religion can solve.