I will try once again to help you out, though you fight me with your own ideas and not what Pope Francis actually said. Let’s get down to the actual words.
The Pope said, and I quote: “the mercy of God has no limits if one turns to him with a sincere and contrite heart; the question for one who doesn’t believe in God lies in obeying one’s conscience.” The important part here is
“turns to him with a sincere and contrite heart.” This means the atheist needs to turn to God, which means believe in God and Jesus. This will begin his journey toward God and Heaven.
Pope Francis goes on: “Sin, also for those who don’t have faith, exists when one goes against one’s conscience. To listen to and to obey it means, in fact, to decide in face of what is perceived as good or evil. And on this decision pivots the goodness or malice of our action.” He is saying here the Sin for the atheist is when he goes against his own conscience. And he acts in accordance with the idea of goodness or evilness in his own conscience.
However, Francis does not say anything here about getting into Heaven because an atheist follows his conscience. Why don’t you read the translated letter and tell me if there is something I missed in there that says an atheist can get into Heaven without believing in God? Here’s the translation:
zenit.org/en/articles/pope-francis-letter-to-the-founder-of-la-repubblica-italian-newspaper