you said:
But that’s the point...a sacrifice is not needed to please God any longer. The sacrifice was made on the cross for all of our sins....past, present and future.
“any longer” describes a length of time
“past, present and future.” describes the dimensions of time
Since Christ is eternal and infinite so any of His actions are eternal and infinite - ie they are not governed or limited by time and space.
Therefore although you are finite and subject to both space and time, however Christ’s Sacrifice is not and is happening for Him in the eternal now.
For the Greater Glory of God
Yes...that need stopped on a Friday around 33 AD. It was confirmed on the following Sunday morning. No need for any additional sacrifices after that. It's called the resurrection.
To say that your past, present and future sins are forgiven does not have anything to do with time as you're attempting to place them. To be quite honest, I'm not really sure what kind of cosmological argument you're attempting to make. Reminds me of my philosophy class in college. Some weird stuff.
To say He's forgiven our past, present and future sins is a way of describing the complete forgiveness of our sins. Whether they're in the past or the ones we will sadly commit in the future. When we believe in Him, those sins are forgiven and covered. They're gone.