China is the more logical choice because its fast replacing the US as the global hegemon and the US has a limited window of opportunity before military victory against China becomes impossible.

The only way America and China will be at war is if they try to invade Taiwan. The U.S. has a vested interest in protecting the sovereignty of Taiwan. Among other things, they are a vital part of the island chain that keeps China contained within the south China sea. Indonesia, the Philippines, Taiwan, and Japan are geographic obstacles that restrict Chinas access to the Pacific ocean. If they were to conquer Taiwan, then they would have access to the open oceans and all its trade routes. China would become an even more powerful force of commerce, and thats something the Americans cannot allow to happen. Their economic growth is unstoppable, and if they aren't stopped, they will leave the U.S. in the dust.

Iran is truly Israel’s last real enemy in the middl east. All resistance to it comes from Tehran. Be it Assad in Syria, Hezbollah in Lebanon, the Shias in Iraq or the Houthis in Yemen, all resistance to the Judeo-Ameircan axis is backed up by Iranian soldiers, money and arms.

This isn't true. Syria is nearly as great a threat to Israel as it was before the civil war. They tried to bring them down with their ISIS militias as a proxy force, but those plans failed miserably. Assad won the war, and Netenyahu practically threw a tantrum. He blamed Obama for not directly intervening in Syria, despite his promises. This was a major political crisis in Israel. Seriously, go into google and type: ''Obama red line.'' You'll find a huge number of political comics excorciating him for his failure to intervene in Syria. This may have been one of the reasons why the Zionist faction helped Trump win the Presidency in 2016.

That’s why Syria, Libya and Iraq had to be ruined. But I digress, the point is that Iran is the last and deadlies enemy of Israel.

If Israel trys to go after Syria a second time, they aren't going to be using proxys this time. They will have to rely on their own military, and American intervention. Israel will probably try to invade Syria through the Golan heights. America can launch their own separate invasion through Iraq (although they currently haven't deployed enough troops to do this).

As for Iran, its anyones guess how that would turn out. The country is quite large and mountainous, with a large population and a formidable military. Its unlikely the Americans would try to invade them, as that would quickly turn into a meatgrinder. They would probably use their warships to try and close down the Persian gulf, imposing a blockade.