What prior event does Acts 15:7 refer to? Prior to Mt 10:5? You seem to claim this, as you imply that the instruction to the twelve superceeds that event. I think that you are incorrect. The clearest connection is Peters dream of the unclean animals. You also seem to attempt to distinguish Peter from Paul here: "not the Gentiles exclusively. Paul was the Apostle to the Gentiles" since Paul also taught Jews as well as Gentiles there is no basis for this.
To "prove" Peter would not have been in Rome Havoc can say "Paul was the Apostle to the Gentiles" - but when the Apostle Peter says: "God made choice among us, that the Gentiles by my mouth should hear the word of the gospel, and believe." We really all (even you) need to pick Peter over Havoc, don't you think?
You forget that Havoc is a prophet. He has full understanding of all Scripture and has little need to piffle with the questions and traps of us little people.
SD
One need not be a prophet to understand scripture. Nor is any person little - though their actions may be.