I guess you never heard or read that Jesus stated that "Whatever you do to the least of my brothers [sisters] you do unto me." [Matthew 25:40-41].  ALL crimes involving others are sins against God.

Leave your 'temporal' vs. 'spiritual'  lollygagging in your glove compartment.  We live, act and move IN TIME.  We are JUDGED SOLELY upon what we do in TIME.  Neither YOU nor I have any idea about life after our time.