As a parent, I’d definitely feel the loss of my child more keenly than the loss of my sibling.
I feel like he died back when my brother died. Every day was a struggle for him. I feel like he’s finally at peace now.
I felt much the same way when my mum died. They’re finally at peace.
I think you’re showing genuine empathy for your dad. That’s a good thing.
NGE’s more skewed towards Rabbinic Judaism. Still Abrahamic though.