I wonder if the same thinking would have it that Paul just renamed the pagan “unknown god” Jesus.
No, that is NOT what Paul did. What he DID do was to tell the men in Athens that the temple they dedicated to The Unknown God - hoping that any they left out wouldn't be offended and do bad things to them, built a temple to basically "any and all gods, etc.", that there was only, one true God:
Acts 17:22-24
Then Paul stood in the midst of Mars' hill, and said, Ye men of Athens, I perceive that in all things ye are too superstitious. For as I passed by, and beheld your devotions, I found an altar with this inscription, TO THE UNKNOWN GOD. Whom therefore ye ignorantly worship, him declare I unto you. God that made the world and all things therein, seeing that he is Lord of heaven and earth, dwelleth not in temples made with hands;
Yes, that's where Boatbums' and other such groups are headed towards.
They chip away a bit and a bit away from Christianity, protesting each time about every thing, until finally they become like the Jehovah's Witnesses.
For example, next week the North-Western Evangelical Bible-Reformed branch of PresbyMennonCongregationalutherAdventipentecostathism is due to split into the Central-North-Western Evangelical Bible-Reformed branch of PresbyMennonCongregationalutherAdventipentecostathism and the Central-Southern-North-Western Evangelical Bible-Reformed branch of PresbyMennonCongregationalutherAdventipentecostathism, but this is good driven as there as a dispute in the Congregation on matters of doctrine, Bobama thought that he should be Preach-pasto-Prophet Elder on Mondays, Tuesdays, Wednesdays and alternate Sundays while Michelle thought that she should be that -- as she had yoga-pilates-kickboxing class on Thursdays.
I think not. One can find the struggle Paul was involved in against the inclusion of the worship of Diana in Acts 19. The merchants of Ephesus were none too pleased with Paul and the other Apostles and disciples teachings contrary to the worship and practices there.