You claimed that the United States had a secret new weapon that could wipe Russia and China off the face of the earth.

Not "a new secret weapon." What I claimed was that China and Russia love to boast of their "new breakthroughs" while the US never admits we have a weapon until we have been using it for decades. We used drones for the first time in the 1980's, and fielded a hypersonic (albeit only an interceptor) in 1965.

Are you saying that The Kinzhal's performance is low and it is not a threat to the United States?

That's precisely what I'm saying. The Kinzhal has been a colossal failure. For 3500% the cost of an Iksander, it has 103% the effectiveness, and our interceptors have shot it down with ease almost daily. And as for Russia's vaunted "Oreschnik," it doesn't exist. It's a Rubezh ICBM with half of its fuel tanks empty. It's a bigger, slower-moving target than a Kinzhal, with a more obvious heat signature.

I don't think China has anything to gain by attacking the Philippines. I think China will attack Taiwan and Okinawa.

The fact that China is broadcasting their intention to do this is why I doubt it. China is going to a lot of trouble to say "we're attacking Taiwan! See?! It's Taiwan! Any day now, we'll attack Taiwan! See?" China's entire doctrine of warfare is built on lies. And they've already been laying the groundwork for an invasion of the Philippines for decades, slicing off layers of its maritime territory and militarizing islands off its coast.

I wonder if China will launch a nuclear attack if the US attacks mainland China!

Well, it wouldn't be the US who initiated an attack, but yes, I strongly suspect the Chinese would be stupid enough to do just that. And considering no Chinese missile has ever hit its target in a test except for one aimed at a satellite, it will be fun to watch their shocked Pikachu faces when their nuke is shot down and we eradicate their population in retaliation.