My question is why do people do erroneous things and later pray/beg to God for forgiveness.?

It is human nature to be self serving, cruel, mean, etc. But when you do things that hurt others or yourself you feel condemned, guilty, and you what forgivness. The point of having religion is having a relationship with God. I am Christian and I believe that a relationship with God starts with the knowledge of Jesus Christ as my Lord and Savior. Sometimes it is hard on us trusting each other and knowing who to trust, but there are good people still around.