Tiktok generally collects the data like video watch list, duration etc. How is that even a national security?
Even if they know behavior of people, how is it even a national security. People generally don't send message over tiktok, so with your logic we should be blaming facebook/google more.
Also, we should be holding liberal values and make same rules for everybody.
With your logic facebook/google all should be labeled national security in Europe.
"The US has made many mistakes,"
Are you really trying to justify the US mistakes by bringing in China? How many countries have China ever invaded compared to US. How many times China have stolen oils from other nation? China have done all wrong things to their own people and US has done more wrong thing to other people. So, your argument doesn't hold water.
"Freedom"
Well, I agree US has more freedom. Freedom has different shades. But, being able to walk without fear of guns is also important to me. Being able to walk without seeing sexual assault in every room of school is also equally important. When I first came in US, the first instruction was "Don't walk alone during night time".