Was I wrong for trying to make sure my dad went peacefully?

My dad had been with me for a month because he was on hospice. Before that I hadn't spoken to my father in 4 years because I found out he was a pedophile and had sexually abused young boys in the past and my 17 year old son became a victim from when he was 4 to 12 when he finally told me and in that time span my dad had raped him over 400x. I called the police and he did 25 months in prison. Then my dad got cancer. He it got really bad. When he was closer to end of life and now needed a caregiver I had some people reach out to me and I took a long time to think about it. The reason I decided to do it and what I explained to my son is the best thing we can do is he nothing like him. Forgive him and take care of him. When God judges us at our time we know we were nothing like him. So I took him in. I also knew he was way too weak and could never hurt my son again or any of my other children. I thought I was doing a good thing. I was choosing forgiveness and made sure my dad was comfortable and he went peacefully. He had his funeral and out if the blue my 17 year old said he wanted to move in with his dad. He said this AFTER my dad died. I asked why and he said he tried to be fine but what I did really hurt him and I didn't listen to him. So he is currently staying with his dad and started posting stuff on Facebook about not believing in God anymore. He usually goes to church with us on Sunday but he refused to last week and I told him he can live with his dad but he at least needs to come to church. That's my deal but his dad is fighting me on that saying I can't force him to believe anything. He believed in God a few weeks ago. It's not like he's been an atheist for years and I've been forcing him to go to church. There's a lot of tension with my family and I feel like I made a mistake and maybe I shouldn't have taken care of my father.