The military prepares for war. This purpose guides everything it does.
Are you willing to kill another person if ordered to do so? Would you destroy peoples' homes or food? Would you help others who are fighting, even if you're not in combat?
Would you risk your life in a fight for someone else's cause? Even soldiers who believe in fighting to defend their country have found themselves ordered to fight when they felt it was wrong. Once you enlist, you can't choose.
If you answer “no” to these questions, you're not alone and you're not unpatriotic. You don't have to join the military to serve your country.