Only one exclamation point is necessary.
At any rate, sure people are responsible for this ignorance. You bet they are. Why? Adam.
Through Christ, we receive mercy and avoid a fair judgement, the results of which not one of us truly desires. Those who sin without knowledge of Christ will ONLY receive a just punishment, the fact that Christians receive mercy and grace is not inherently relevant to the issue of justice for the unbeliever. No one will be found guilty who is not guilty, God shall be fair to the unbeliever.
Since salvation is the avoidance of just punishment, and is available to all who place their faith in Christ, the importance of Evangelism springs up. If those who were un-knowing of the Gospel of Christ were automatically forgiven, then Evangelism would in fact COST people their salvation. This seems to be the opposite of Biblical teaching.