Details, details.
He didn’t really mean “finished” finished when He said “It is finished”. He really meant only partly finished, dontcha know?
The Catholic Mass is a demonic insult to His finished Grace for us, as if the institution of catholiciism is required to continue a FINISHED Transaction.
And like the brass snake on the pole, anyone who believes in Jesus as The One Whom God sent for their salvation and accepts the Grace purchased at Calvary --Once for all, for all time, forward from Calvary and backward from Calvary-- they are the healed.
Who finished the transaction that only The Precious blood of Jesus could make? God with us, Jesus. Not some catholic or Mormon priest, JESUS.