They should do exactly what every other nation does. Go in, but take extra risk in how you do it to ensure you keep the civilians reasonably safe as you do. That means you dont level an area with civilians with bombs, you go in with snipers or targeted amunition and make an attempt to reasonably limit civilian death, even if that puts your own military at a slightly higher risk. Because thats what good people do, they risk their lives for the innocent.