Nations have no business taking upon themselves to exercise wrath unjustly, and if they do attack wrongly they also suffer wrath indue course.
All wrath is part of the love of God with the intention of providing an environment for nations to "search for God and perhaps grope for him and find him" (Acts 17:27). And the ultimate intention is to bring as many children to glory in the eternal city of God as would be happy to be there.
Modern people are sentimental about death because they fear it. And the media love to to be horrified by death in large numbers. But when we see it as a means of moving from this life to our eternal home (like going through a door) nations undergoing wrath is not a tragedy. And it makes no difference for us how soon it comes to babies, children, innocent people, and large numbers in a nation.
That sounds heartless, but we cannot avoid the fact that it happens, and the LORD and those who know him feel the pain and compassion for the bereaved. Those who are sentimental and upset about death become paralyzed. But those who believe the reiging Messiah is totally loving even in exercising wrath, they are the ones in the forefront of caring for the needy all over the world.