I would argue that more people will justify their violent acts, burglaries and criminal behavior by saying “god will forgive me.” If what you say is true, why do you suppose that atheists supply less than 1% of prisons while Christians make up 75%?
Atheist make up a very small percent of the population in the USA. So because there
are not many atheist in America, there are not many atheist in prison.
I worked at the county jail in Florida for 10 years.
From what I saw most people in jail are not Christians they are just people in a Christian country.
Most people in jail don't go to church every week or they would not be in jail.
It is true that there is a lot of evangelical work in the jails. Christians make bibles and bible studies
available to the inmates. But from what I saw the majority of the inmates were not practicing
Christians.
I never came across anyone who said "God will forgive me", I did come across a lot of people who said
they were going to hell.
God only forgives those who turn around and repent and take Jesus into their life.