ex pastor here and atheist. Why did God not heal my son of cancer?

In his post to r/atheism:

"Hi, my name is John Cooper. I was a Namibian pastor for the past 13 years. I loved God and pray feverishly ,but i fell on very bad times in the last 2 years. I lost my trucking job when they decided to use the South African ports to bring in imports instead of Trucks. That was the beginning. My Uncle commited suicide a month later. I prayed hard for God to answer me why this happen. I got no answer. So i managed to get employment as a petrol attendant( to full gas in cars) and things became worse, my son got lukemia at 14. He tried treatment and it made him bald and sickly. The pain was so bad he cried and asked why God allowed this to happen. I said it in his plan i suppose with tears running down my face. But deep inside i cried for 2 reasons, my dear boy and the pain knowing then. Then that God is not real. I cried and prayed for God to help my son,got people to fast and pray, everything. nothing helped. He now is a skinny bald kid who eats mostly through tubes. This was from a healthy soccer loving kind child. that Sunday i told them i am letting someone else take over. I burned my bible with rage, not at a god, but for me been dumb enough to follow a God with no evidence. I lost my faith. Science saved my son,and not jesus, buddha goku etc. I had to admit that God is not real and i am on a journey of discovery towards sciences, and been a better parent. I am reprogramming my head not to hate any people, especially the LGBTQ people. I cried when i remember preeching them to be punished in hell for been wrong, i disowned my own cousin who confessed he was gay 23 years ago. that is the danger of religion. please don't raise kids religious and treat people good. thank you. a new atheist."

/r/Christianity Thread