All humans have the ability and bent to invoke situational morality to justify any savage action. And only a power higher than man can set absolute morality and whether you believe he was the son of the living God or not Yeshua set a standard that no other philosopher could ever hold a candle too.
With humanistic moral relativism, Hitler can convince a nation that a race should be eliminated because they are inferior. And while there must be an overall, objective truth that there is or is not a God, each person has nothing to stand on but faith in believing whether there is or there isn’t a God.
But let’s use torture as an example of dealing with a question of morality. Let’s bring torture up close and personal. Let’s say you have family and friends and an organization kills some of them for ideological reasons. They tell you they plan to continue and you manage to catch one that you think knows the plans. Picture you having to send your only child to school.
Here’s the question Do you love that enemy so much that you’d protect them from torture and thereby fail to find out the plans and allow the enemy’s friends to kill your only child. A real group in the real world murdered more than 130 children. We can relate to them and the number and many around the world were outraged. But for the ones who did it, it was nothing more than performing a few post-birth abortions (abortion is a euphemism for murder that is consistent with Orwell’s 1984).
So as Christians, we ought to live with an eternal perspective and know that God did not spare his only child when we were his enemy and we should admit we were the reason his son was tortured and killed so that our sin debit might be paid that we could have eternal life. Because of that eternal perspective, I know that I will be reunited with my child should they be killed and that God will dispense justice on an eternal scale to those he judges but I also know that if I extend grace and mercy to the captured enemy despite the fact they killed my loved ones then it may lead that enemy to a redeeming relationship with Yeshua the messiah. I’ve yet to find any other religion or secular philosophy that simultaneously yields justice, righteousness, grace, and mercy. If that sounds good to you, then seek God with all your heart and you will find him.