"If these two get into a fight, we can move on with our Taiwan agenda."
That's why Trump is pushing the EU to properly finance their defense, so the US can concentrate on Asia Pacific. He signalled this during his Notre Dame meeting with Macron, France being the only European NATO ally with a reliable army and interests in the region. To Trump, China is the new US rival, Russia is merely a bigger Iran with nukes and more advanced tech. I don't see him giving Tiktok a break.
And we know this type of thing works because we see it everyday with US internal propaganda. The last thing the US needs is an adversary with a direct line to the US populace controlling what they see. Also, I'm not even talking about misinformation, just pushing what stories are seen and not seen. Once you add in misinformation and bots it's pretty wild how easy it appears to control the population.
The point is not to push Americans towards Israel or Palestinians, the point is to push Americans apart from each other, so that each half of the political divide sees the other as supporting baby-murderers, as people you cannot be friends with, compromise with and shouldn't even try to talk to.
I am not exaggerating, each of these things I have seen being explicitly pushed.
If something can be done through the Israeli/Palestinian conflict which damages the US, you can be sure China is working on it.