Brother DHK,
The great commission you quote in Matthew 28:19-20, was it not given to the apostles or was it given to you in those verses? This command was to the apostles and the Scriptures make it abundantly clear that the apostles did indeed fulfill this command. Several years after the command was given, the apostle Paul reported that the gospel had come into "all the world" (Col. 1:6) and had been "preached to every creature which is under heaven" (Col. 1:23)." Also, when Christ placed this "great commission" upon His apostles, He promised them that great signs and wonders would accompany the fulfilling of this commission. These signs would be in the form of special apostolic powers, such as the ability to cast out demons and the ability to drink any sort of deadly poison and remain unharmed (Mark 16:17-18). The fact that these special powers are no longer with us is a further proof that the "great commission" has been fulfilled.
God bless,
Brother Joe
Let's consider that in an actual historical context.
For example, what about Ephesus?
In the Book of Acts Paul called the elders of the church at Ephesus to him.
Act 20:17 And from Miletus he sent to Ephesus, and called the elders of the church.
--He testified to them how he had labored among them.
Act 20:19 Serving the Lord with all humility of mind, and with many tears, and temptations, which befell me by the lying in wait of the Jews:
Act 20:20 And how I kept back nothing that was profitable unto you, but have shewed you, and have taught you publickly, and from house to house.
He told them of their responsibility:
Act 20:26 Wherefore I take you to record this day, that I am pure from the blood of all men.
Act 20:27 For I have not shunned to declare unto you all the counsel of God.
Act 20:28 Take heed therefore unto yourselves, and to all the flock, over the which the Holy Ghost hath made you overseers, to feed the church of God, which he hath purchased with his own blood.
He warns them of false teachers:
Act 20:29 For I know this, that after my departing shall grievous wolves enter in among you, not sparing the flock.
Act 20:30 Also of your own selves shall men arise, speaking perverse things, to draw away disciples after them.
Act 20:31 Therefore watch, and remember, that by the space of three years I ceased not to warn every one night and day with tears.
--This was probably in the early 60's.
Now, more than 30 years later Christ addresses the same church:
Rev 2:1 Unto the angel of the church of Ephesus write; These things saith he that holdeth the seven stars in his right hand, who walketh in the midst of the seven golden candlesticks;
He tells them what he has against them:
Rev 2:4 Nevertheless I have somewhat against thee, because thou hast left thy first love.
The solution:
Rev 2:5 Remember therefore from whence thou art fallen, and repent, and do the first works; or else I will come unto thee quickly, and will remove thy candlestick out of his place, except thou repent.
--He gave the solution or remedy, but he also gave a warning and a judgment.
What happenend? In a matter of decades the church of Ephesus ceased to be. When Islam came upon the scene it took over where the church supposedly existed. But now it is an empty wasteland where nothing grows.
The Apostles didn't reach all the world. Even Paul admits to that.
Paul's statement refutes Col.1:6, which you have taken out of context.
Rom 15:20 Yea, so have I strived to preach the gospel, not where Christ was named, lest I should build upon another man's foundation:
Paul wrote during his first imprisonment in Rom to the Colossians 60-62 A.D.
It is believed that he was freed and traveled afterward even as far as Spain as he desired to do.
Rom 15:23 But now having no more place in these parts, and having a great desire these many years to come unto you;
Rom 15:24
Whensoever I take my journey into Spain, I will come to you: for I trust to see you in my journey, and to be brought on my way thitherward by you, if first I be somewhat filled with your company.
Paul did not go where others had already been.
The Colossians had not yet been to Spain.
That is where Paul purposed to go.
You reasoning is fallacious.