Outline of 3 Angel's Message Simplified: It Ends as it Began

1st Angel's Message:
Called to the True WORSHIP of God

2nd Angel's Message:
Called away from the False WORSHIP of God

3rd Angel's Message:
The showdown over the 2 forms of WORSHIP of God

As innocent Abel fell before Cain (who received a mark) so too will spiritual Abel (via martyrdom) fall before spiritual Cain (with the mark of the beast) in the end......over WORSHIP of God...

Not as Cain,
who was of that wicked one,
and slew his brother.
Q: And wherefore slew he him?
A: Because his own works were evil,
and his brother's righteous.
1 John 3:12