Hello dear agnostic community.
Thanks for a very interesting topic about the grieving process. I was raised in a Catholic family but I always felt that God was not real due to manipulation through fear and oppression. So I gave up the religion of my
childhood.
I lost my mother many years ago. I went through all the stages of mourning for the death of my mother but sometimes I feel in pain and I miss her when I start to relive the good times that I spent with her. I know that our bodies deteriorated over the years and Science can't stop that process.
I have read many books, I have watched videos, I have talked to many people about the stages of pain. All of this has helped me overcome the pain of having lost my mother.
My Christian relatives are more satisfied in accepting the loss of my mother because they believe that they will see her again in the afterlife.
As a non - believer I know that her body won't come back to life and I will not enjoy her being again.
Sometimes I feel guilty about her death for not having done more to keep her alive. But later I return to the reality that this process of death was inevitable.

Why would a religous person feel grief at all, their loved one is in a better place and the will join them when they die?

With christians there is a 6th stage, rising from the dead when jesus comes back for them.

Not trying to be rude to you, but what a load, that's a bandwagon argument. It's widely accepted that there is a god, so what? Different people experience grief in different ways and some people just don't. Saying there are 5 stages that you can experience in any particular order and you may not even experience them all is an unfalsifiable argument and if you have any scientific background you'll know how useful that is. And maybe you might think that doesn't address your main argument re: acceptance, but if your initial premise is flawed, you need to rethink. Considering the vagaries of human experience I would also question the concept of stages. Re: xtians: throughout history people have believed in gods and an afterlife. Are you arguing that none of our ancestors successfully grieved or reached acceptance?

The only emotion I felt when my mother died was relief.
I went through those stages at not having a mother that other kids did as a child I suppose.

Stages of grief are not experienced in any particular order and I believe everyone who suffers a loss of someone important in their life will either go through them - likely several time if my personal experience is any indication - or they will likely suffer some kind of consequence from suppressing the grief. Religious dogma could inhibit the process by providing someone with a rationalization for denying their need to grieve, but it won't remove the need to process their feelings of loss and to adjust to life without someone who was important to them.

I understand that some psychologists have claimed that individuals go through these stages with even minor and insignificant losses. The process may happen much quicker, like minutes or seconds, but we still go through them.

I feel that anything religious is just fake.

It’s widely accepted in my home that I’m sexy af....if you don’t believe me, just ask my cats!!

Having been raised in a Christian faith, I can say that I have personally witnessed many people who never shed a tear at the death of a loved one. They firmly believed that their loved one was in a better place and that the next thing they would see was the reunification with their family. If you believe that your existence on this planet is akin to being in a waiting room, how can you ever truly be sad over the death of a loved one? For these people “acceptance” is the first and only stage of grief!

The fact that so many do believe they will see that loved one again after death is a major point in carrying and spreading religion.

Not so. Believing in religion is all about acceptance. According to religion, when you die, your soul goes on to continued existence in a magical golden kingdom in the sky as the favorite pet of an all-powerful superbeing. If you can accept that, you can accept anything.

Belief in an "afterlife" means noting because ultimately you have to die to find out (or more likely you never do because you're dead) so acceptance for that reason is futile