What would it take to change your mind?

[CoxRox]

If I'm understanding it right then basically, if I commit these sins (such as cursing gods name) then it may not be a christians job to do the deed but, to trust that god will judge and shorten my lifespan himself if he concludes I deserve it.

I don't think God is 'shortening' anyone's lives (since the 1st Century) from the 70 or 80 odd years we usually live for if we believe the claims of the early Church and Jesus' teachings. We are being permitted to live our lives for good or bad and some of us may die sooner due to illness, natural disasters or crime. There is no evidence that God is dealing in a supernatural way with 'the world' (or non believers for the purposes of this discussion).