The problem with that is man has created their own religious beliefs, Jesus never gave a sacrifice , he was perfect. But he provided a sacrifice that was more valuble then Gold , silver , precious stones , currancy, or animal.
Himself. The first born of his Father.
If you had a dreaded disease and you needed a cure and it was no cure how sad of the ending,
But someone created the antidote that would cure ,
A price would have to be paid to save lives .
To recieve it.
This is our case what ever is our sickness, mental, physical, or even death the cure was provided by Jehovah through his Son Jesus.
We do not need sacrifices of animals or humans to be forgiven for our sins.
Jesus paid once and for all.
If people are doing this then they are voiding out their gift of forgiveness based on the fact that Jesus already paid for our errors.
Not just ours but for the whole world.
But it is only valid if you admit you need his cure. And are appreciative of the provision it took to make the cure.
All who do will recieve the cures after the earth is cleaned up .