Freemasonry is a secret society.
All secret societies are satanic.
Freemasonry is the most well known secret society.
Freemasonry itself is a satanic organization, even if some of the Freemasons seem otherwise like "good guys."
Here is an overview of Freemasonry:
People disagree endlessly about Bible verses. If you think one party has the true meaning and all others are incorrect, then it would make sense for you to think there's nothing esoteric about it.
But personally, I can open the Bible to any page and put my finger just about anywhere and find a line that I'm not confident that I understand. Many people have studied it diligently their whole lives and still have unanswered questions. Why? Because it's definitively esoteric.