There are times that I find it somewhat difficult to believe that God and Jesus are still allowing all the bad to continue. It causes some doubts but my desire to want to believe in something bigger than myself is overwhelming. So, I cannot walk away from Jehovah, YHWH, or any other name you want to give Him, or Jesus. That said, my opinion of why JW's turn athiest and don't want to believe any longer in God is because the organization has monopolized God and Jesus so much that they, the organization and God and Jesus, are one. So, when witnesses become aware of the lies and hypocracy that exist in their "beloved" organization and they leave, they then have to leave Jehovah and Jesus because they are all one in the same. I feel that some continue to believe in God and Christ because they have been able to seperate the organization from them and realize that they, the organization, Jehovah and Jesus, are not the same thing. And they can begin to heal their anger at God and Jesus once they realize that the organization is just another tool of Satan to try and take glory away from its rightful source.
Just my opinion, nothing more.
Loruhamah