****According to this booklet, one “mark of the beast” is the alteration of God’s Commandments.****
The SDA used to claim that “the mark of the beast” was worshiping on Sunday. They “proved” it by one of the most convoluted twisting of scriptures I have ever seen.
What day did God rest after Creation? What day did Moses keep? What day did Jesus and the disciples keep? Which of Gods commandments starts with the words "Remember" to indicate people would either forget or it would be changed? I doubt Sunday keeping is the Mark but the forced actions to worship on a particular day or way or to a particular deity could very easily be the Mark.