The question of whether it is acceptable to kill large numbers of people in other countries and upset regional or even World peace is a very important one I think Christians need to think about.
It is absolutely important. You would think that wouldn't be a question, but that depends on your definition of a person. If you can get enough people to believe someone is not human, or a person - that they are animalistic, violent, and downright evil by nature - then it is easy to destroy an entire population and get the people to back you up. Fear also helps.
And, it also depends on the "people's" uncanny valley. The deeper it is (universally, especially,) the more "acceptable" i5 is to destroy the entire kind. Zombies, and AI that look human are universally accepted entities with deep uncanny valleys.
And there's this parable of the Good Samaritan and 'love your neighbor as yourself' and that 'neighbor' also therefore includes someone from a different country.
It is painfully unpractical for humans to do this to each other because we are evil by nature - according to angels and God. That is why there is no actual good person, because no one on this planet does 100% good things 100% of the time.
This Samaritan incident wasn't really an example of how regular people should behave toward one another, it was highlighting how to love your enemy and what that means to God. Samaritans, in general, hated Hebrews. And Hebrews were by sight recognizable. So when the samaratin helped Christ, the surprising thing is not that this person helped Christ, but that he helped an Hebrew at all - and it just so happen to be Christ.
This seemed to suggest we shouldn't steal from other countries or bomb them, but I couldn't get any present day Christian support on that especially since most of Joshua and Judges is about killing complete communities.
We shouldn't be mass murdering people, but there is a difference between murder or killing.
In antiquity, the Hebrews were trying to fight off a ruthless race of abominations - the nephilim, anakim, rephaim, and enim. They are the remnant seed of the union between angel and humans. The Hebrews were ordered to kill all of them, because not only were they genetically modified with angel and technologically enhanced DNA, the larger/champions of them were obliterating the Hebrews.
These things seduced the women, and taught them how to make human sacrifices in honor of them. They took Hebrew men, and made soup stock with their bones. They relished in torture. They had to go. Their uncanny valley was abysmal.
This is controversial, because many Christians do not believe Genesis 3, 6 was about angel and human sexual interaction: to them, the sons of God were Seth, and the daughters of men were self explanatory.
So, you WON'T understand why God told the Hebrews to, for example, eradicate the Philistines, or how men can be 9 feet tall and be champion fighters (even though giantism exists, the people with this problem are fragile, and their bones are weak. Golliath, for example, was a champion fighter - which means it wasn't a thyroid problem. His stature supported healthy living with proper musculature and weight distribution.)
The apocryphal books explain this in detail.
31% of American's are born-again Christians and G W Bush's staff was stuffed with them, yet no one seemed fussed about bombing and invading Iraq even after it was fairly certain they had no WMD.
I ended up just not knowing what the Christian message actually was.
Don't let men determine your rationale for your spiritual relationship with God.
Anyone can say they are Christian, and you can see that many well intended Christians have their own standard of what is Christianity, and what is blasphemy. Even Christ says many of those that say they did things in His name wi be rejected.
Test the spirits: does it make sense to bomb an entire civilian population because of the alleged actions of a few people?
Christians shouldn't be invested in this wod enough to have a say on things like this, anyway. We [are supposed to] know these type of evil iterations are periodic. We don't sit on our hands, but we don't let it distract us.