The dragon was wroth with the woman
“And the dragon was wroth with the woman, and went to make war with the remnant of her seed, which keep the commandments of God, and have the testimony of Jesus Christ.” Revelation 12:17
“The woman is a symbol of the church, and the remnant of the church represents the Christians of the last generation of men, living just prior to the Second Advent. The dragon makes war on these for keeping the commandments of God, Sabbath and all, and having the testimony of Jesus Christ, which, according to the inspired definition of chapter 19:10, “is the spirit of prophecy.” Here, then, are the causes of the dragon’s warfare upon the remnant. They teach the observance of the Ten Commandments, and the revival of the gifts, and acknowledge the gift of prophecy among them. When the devil got one foot upon the fourth commandment, and the other upon the gifts planted in the Christian church by Jesus Christ, then his satanic majesty was filled with revengeful delight. But when the remnant, whom God designs to fit for translation to heaven without seeing death, “ask for the old paths, where is the good way, and walk therein,” then the dragon is worth, and makes war on them.
The true spirit of the draconian host, which is already being somewhat developed, is vividly described in Isaiah 30:8-13, as being manifested just prior to the sudden destruction of those who hate the pure testimony, and love smooth and deceitful things.” 3 Spiritual Gifts SG 26.2, 3