This topic has become a doctrinal issue that has escalated over recent years. The "why" is uncertain, but it may be that it is a reaction to the general increased "falling away" of His churches from the holy standards of God.
Reacting is usually motivated by emotions thus creating positions that waver as times change. God's people and churches should endeavor to avoid any type of progressive behavior that is motivated by emotional subjectivity. We are witnessing a great deal of compromise, but "fighting the good fight of faith" ought to find us clinging to the "faith once delivered unto the saints."
This study is comprehensive in that it considers context, a thorough biblical reckoning, and historical accounting.