To Mark first. If you cannot quote Mark 16:9-20, How can you quote Matthew 28:19?Hi Ituttut,
"Should we really try to find a LOOP HOLE in order to try and justify what we believe?" No, but we should support what we teach as doctrine from sources that appear to be written by inspired authors, not additions by uninspired men.
I could not follow you effort concerning Old Testament and New Testament. The Old Covenant ended at the cross, and the New Covenant began with the sacrificed blood of Christ.
Of course Mark's gospel is true. Just do not quote Mark 16:9-20 as support for doctrine without also citing a parallel passage in another gospel. Serious doubts exist as to whether these verses belong to the Gospel of Mark.
As to the Testaments, we know that Jesus lived in OT time for He was under the Law of Moses. After the Cross we know the Kingdom was still at hand, for Israel had another chance to receive Messiah as their King. Had they done this then the Tribulation period would have been next. Jesus did shed His blood that would bring in the NT. However we know from Luke 13:6-9, even though Messiah had been cut-off, the tree still stood. So while Israel was still living in OT time, yet NT time had started right after the Cross. So what you have, even after the Cross is actually still OT because Prophecy was still in action. However Jesus while still living in the OT gave His Apostles broken bread and red wine. Matthew 26:26-29 tells this is a one (1) time event for them. From the OT He points to the coming NT.
Here is what I find in scripture as to Old Testament, and New Testament. I believe both will endure until time is no more.
a. OT until the Cross.
b. OT/NT to Pentecost, but Blood not applied.
c. OT/NT after Pentecost until Acts 9, Power of Holy Ghost available to Israel, and Blood available, but not applied. The Salvation that was available was found in the Great Commission. Peter told thos men of Israel you must be Water Baptized to gain Remission of Sins.
d. OT/NT Blood available, and applied to the Gentile in Acts 10. The blood is applied to the Gentile, apart from laws, rituals, and ordinances of the Covenant people.
e. OT/NT with Blood available, and applied to Gentiles (Body of Christ) which Peter comes to recognizes "But we believe that through the grace of the Lord Jesus Christ we shall be saved, even as they", Acts 15:11. Israel, and their proselytes will be saved into the Body of Christ.
e. OT/NT salvation, but Power of the Holy Ghost given to some, last shown when Paul approaches Rome.
f. Paul was chosen by Christ Jesus from heaven to be the Apostle to not only the Gentile, but also to the Jew. Paul preached to those that will inherit the earth the Kingdom of God. But Paul also had a Heavenly Gospel. He also preached "those things which concern the Lord Jesus Christ", i.e. The Body of Christ, Acts 28:31.
g. As we now rest from our study of His Word, we may see that we have a choice. Israel did not have a choice of avoiding the Tribulation period, because they made Covenant with Him. But we today can choose. I choose to be in the Body of Christ. Some choose to be in the Kingdom of God. That said, I do believe all are in the Kingdom of God, but are all in the Body of Christ?