B. New Testament. Does not authorize dancing but to illustrate a point. They rejected John the Baptist and Christ. No support of the modern dance. No evidence that it was comparable to the modern dance.
Dancing is therefore sinful.
To do something which causes others to stumble, i.e. leads them into error of sin . . . That which causes a Christian to set a bad example before others is sinful. Dancing causes a Christian to set a bad example before others. Therefore dancing is sinful. Most juvenile crime has its inception in the dance hall, either public or private.