Matthew 18:9:
“And if your eye causes you to sin, tear it out and throw it away. It is better for you to enter life with one eye than with two eyes to be thrown into the hell of fire.”
Cut your index finger with a pair of pruning shears. Unlike shooting and killing other people just because it's what you're told to do, mutilating yourself not to do it is honorable and actually takes GUTS.
Same with the index finger they may want to force you
Killing is a SIN. NO EXCUSES, NO EXCEPTIONS.
IF YOU JOIN THE MILITARY, EVEN IF DRAFTED, AND KILL PEOPLE, YOU WILL GO TO HELL.