How sound is the doctrine in Dante's Inferno?

I have read Dante's Inferno and was wondering how Theologically sound some of the points-of-view really are? Now I know Dante's Inferno was not written by a priest or anyone really involved in any sort of real church. So it could be that it was never really meant to be considered as anything but a flight-of-fancy,but still the religious imagery is so vivid and profound that I cannot seem to shake the idea that these where the cherished beliefs of the writer. What shook me is the idea that the well-meaning pagan would go to hell. This struck me as an odd belief when the Bible mentions that those who don't have the law are still governed by it, their conscience bearing witness. This seems to me to be at odds with what the Bible teaches. I guess Dante did not believe in the salvation of infants either. The second issue that struck me is how bad the sin of suicide is considered in this book. Now we know suicide is often a result of very real mental disease. The idea that these people would be denied entry into heaven as a matter of principle over a disease they may not have any control over, does not strike me as the actions of an all-good and loving God. Now again this work may very well not be endorsed by any church, but still the theological implications may be worth discussing as there exist the real chance that some may people reading may consider it doctrine.