Christians must adhere.
I'm born again and have a working knowledge of the scriptures but what scripture cautions us not to do business with the unGodly?
You betcha!
All part of the Spiritual War going on around everybody.
Everything worldwide is choking out Christianity - all other religions are exempt because spiritually speaking, they are all on the same side and same team and lead to the same place.
Oh and Judaism will be next once the last vestiges of Christianity are gone.