Luke 24:44-47
44 And he said unto them, These are the words which I spake unto you, while I was yet with you, that all things must be fulfilled, which were written in the law of Moses, and in the prophets, and in the psalms, concerning me.
45 Then opened he their understanding, that they might understand the scriptures,
46 And said unto them, Thus it is written, and thus it behooved Christ to suffer, and to rise from the dead the third day:
47 And that repentance and remission of sins should be preached in his name among all nations, beginning at Jerusalem.
48 And ye are witnesses of these things.
49 And, behold, I send the promise of my Father upon you: but tarry ye in the city of Jerusalem, until ye be endued with power from on high.
Acts 1:8-9
8 But ye shall receive power, after that the Holy Ghost is come upon you: and ye shall be witnesses unto me both in Jerusalem, and in all Judaea, and in Samaria, and unto the uttermost part of the earth.
9 And when he had spoken these things, while they beheld, he was taken up; and a cloud received him out of their sight.
This seems to be in contradictory to what Luke did said in the Acts account versus his own writing at the gospel or one is in error either the one you are holding as the gospel preaching is to “begin from Jerusalem” or as Christ said in the book of Acts saying “both in Jerusalem, and in all Judaea, and in Samaria, and unto the uttermost part of the earth” If that is the case, yours indicates a focal point or starting of Gospel preaching and baptism of water and really contradicted what he later says as in Acts 1 and that is you are presenting a contradiction. Now my position is that Luke’s writing in the gospel books and in the Acts is not in contradictory. Simply, Luke used ‘beginning at Jerusalem” to indicate occurrence in, on or near, ‘at’ is used to talk about where something happens in other words the point of beginning to preach the gospel or good news that Jesus saves will not begin from Jerusalem, because Christ already did, Christ claimed in his early ministry of the gospel that he saves by putting their trust on him, the same message after his resurrection and ascension and they were only to continue, though this has a fresh meaning since it already fulfilled what was written about his death, burial and resurrection which is then now the basis of the gospel propagation around the world. The word “both’ qualifies that the gospel preaching and water baptism to be propagated alike or equally at any place without restriction even to the uttermost part of the earth or where ever they are. This is not the question of where to start but rather when to start which is after the Holy Ghost empowers them or until they “be endued from the power on high” where they can carry the GC “both in Jerusalem, and in Judea, and in Samaria, and unto the uttermost part of the earth”