Save you the trouble of going through this whole comment, Napalm is definitely a weapon of foul reputation.
Napalm is a substance that burns persistently even in the absence of oxygen and WAS used by the US... on the city of Kyoto, the former capital of Japan before the napalm razed it to the ground (hey, when your walls are made of paper, fire is a legit problem). Now the capital of Japan is in Tokyo, which is an entirely different location, despite being a literal anagram of the former capital's name. It was also utilized in the Vietnam War, and in the Korean War too. By Americans. In heavily forested areas.
Dropping a substance that refuses to be extinguished on cities made primarily of wood and paper, or in dense forests, is kind of a dick move. Would you excuse the usage of the Atomic Bomb as well? Because that was also made by the USA, and it was unilaterally BANNED by the UN for being TOO destructive. No nation is perfect. And Napalm is a very, VERY malicious weapon. It only stops burning when the fuel runs out. Oxygen? Not required. In oxygen-deprived conditions, it will stay dormant until oxygen returns while consuming flammable materials. it burns underwater. It BURNS. IT BURNS. The MOST PAINFUL SENSATION that any human can possibly endure, is being cooked alive. During the Vietnam War, a Buddhist monk performed a rather horrific protest by dousing himself in gasoline and lighting it on fire. He immolated himself. His protest worked at getting attention, but damn bro, did you have to make yourself Well Done? Fire has always been a symbol of war and conflict. Napalm is fire 2.0. Using it in a military sense is 100% dishonorable. It's made of gasoline and aluminum filings, IIRC. It wasn't much of an invention to come up with and could have legitimately been an accident.
Remember: there's more to good and bad than which nation you are looking at. There are intent, motive, methods, and alternative methods. If you have to use Napalm because you are out of options, then sure, go ahead. But if you have alternatives... use those instead. Be the better man, and not torture your enemies. Be like the Samurai were supposed to be, and be honorable about the way you treat your enemies. You will get more people helping you when you lose a fight that way.