"I am also suggesting that bullying is part and parcel of most religious teaching and has been down the ages."

It wasn't for me. Not at all. But a lot of my upbringing did involve bullying.

I have seen Atheists say that if you believe in God you are stupid and mentally ill. Not blackmail perhaps, but still bullying.

I think "lets work together in peace" is the best approach.

Did the C of E say "if you don't go to church you'll. (go to Hell or whatever?)"

My Mom's family and my Grandmother on my Dad's side were all Anglican. I never once heard that from them.

I empathize with your experiences. But they are far from universal.