How do you get people to view a selfish use of military force, harming people, as 'wrong'?
There is a strong bias to do the opposite, to support the selfish use of military that harms others.
It makes people feel powerful, it gives them a sense of pride, they say they 'won' things, it can result in gaining land, money, power, basically, 'the people who were there lost, and you benefit'. Whether you take things, or those people have to become subservient to your interests, etc.
And there a lot of blinders to not see why it's 'wrong'. They include - almost always - finding some sense of grievance to justify the action, or disliking the 'enemy', or many other things.
And let me then flip this around. When exactly is it not right?
In Iraq over 400,000 bodies have been recovered from mass graves, all victims of the Hussein regime. A single grave site outside of Baghdad had over 60,000 bodies. It is not like he was some beloved benign dictator, Iraqis around the world celebrated when he assumed room temperature.
And I can go on and on and on, but it really does not matter. I am positive that you will vomit up some nonsense about each and every action taken is wrong. And this kind of blindness is something I see as pathological, and simply can not be resolved.
And I am sure that behind every action in the past 70 years, you are going to see some kind of boogie-man behind the scenes pulling the strings in order to get rich. Jews, the MIC, Big Business, it really does not matter.
I remember back to 1990, when so many people were screaming "No war for oil!" Yea, tell that to the thousands of Kuwaiti's killed when Iraq took over their country. Tell that to the families of the almost 400 that are still missing. And that is out of over 600 kidnapped from Kuwait and thrown into Iraqi jails. Despite claiming that Iraq never had them, 236 bodies were recovered from Iraq in 2004.
Kuwait takes case of Gulf War 'disappeared' back to UN - The National
So yes, the US and other nations should absolutely step up and take action in such circumstances. However, there are always going to be incredibly selfish individuals, who care only about themselves and are willing to do absolutely nothing to help others. Even screaming against those who actually are willing to help.
And in all my deployments, I have talked to a great many people in a great many countries. And not one of them was anything other than grateful for the assistance the US has given them.
But please, I want to know about these wars that you are talking about that are so destructive and evil.