That's a dangerous assumption in an election year where even if they do not vote R, they may not vote at all (this is a position voiced by many, and prevalent in pop culture) which could hand the election to "America's Hitler".
This year, criticism should be levied against both parties, and that's not happening. Republicans in congress literally just applauded the genocide.
Next year, assuming Harris wins, continue to protest their position.
Where were they at the RNC, hmm?
"Whatabout US companies"
US companies have seen similar criticism, antitrust suits, and billions in fines.
It is true that US tech companies have horrendous practices when it comes to data privacy and security, and that the US needs better federal regulation similar to GDPR to protect the consumer. This must be corrected.
It's also true that the location of the parent company of a social media platform does not protect that platform from bad actors and adversarial abuse. See: Facebook in 2016
However, there is a big difference between selling bits of redacted data to ad companies, and providing raw database access to a foreign adversary with malicious intent.
Add to that the fact that kids/teens use tiktok more than any other platform, and their habits are exposed without their knowledge or consent.
The possibilities are endless, but to name a few concerns:
The EU has already fined them for their negligent privacy practices: https://www.cnn.com/2023/09/15/tech/tiktok-fine-europe-children/index.html
It's not enough. I don't think a ban is the right solution, but the problem is clear.
Is it really such a stretch to say a Chinese owned company managing the feeds of the most active social platform would use that platform to sow division and hatred in the US?
This is an oversimplification that ignores important context. Pushing the sphere doesn't open the door if the sphere is not in power.