can we move on now?

I stopped talking with my father because of my circumcision. In our case it was different, as he cut his foreskin at 26 due to adherences and para-phimosis. I told him I thought neonatal circumcision was a crime and he replied that if I didn't shut up, he would likely commit another crime.

You can not determine how someone else reacts to your actions. You may have thought this was the best for you both, but by your own admission it wasn't. You can't expect your son to move on unless you have returned what you took from him. Now you can only accept his grief, you were the cause of it.