"Your illustration shows satan's minions plucking people off the ladder."
Actually, it doesn't. What it shows is temptation. Try Googling for a larger image.
" The Bible clearly states that nothing will pluck us from his hand."
True enough...once we are "in" God's hand, at the top of the Ladder.
"If you want a more accurate illustration, you should show the saved getting on an escalator and the damned bypassing the escalator and insisting on climbing the ladder themselves."
What an excellent similie to the Protestant "no fuss, no muss, sin vigorously because you're "elect" theology of salvation!
What works have you done that have contributed to your salvation.