Yikes - you can't post like this here, and we have to ban accounts that do, so please don't do it again.
Edit: you've been breaking the site guidelines so badly and so frequently that I think we have to ban the account. I've done that now. If you don't want to be banned, you're welcome to email hn@ycombinator.com and give us reason to believe that you'll follow the rules in the future. They're here: https://news.ycombinator.com/newsguidelines.html.
Fascinating. Really surprised to see they have it as "reconsider travel". Reading the explanation it makes some amount of sense. I can't say that the issues they state don't happen, it's just they are so rare I never really considered them in day to day life there as a foreigner and still after decades don't know anyone who has been affected by them outside of very publicised cases.
I'd say for the vast majority of people not directly involved in tense parts of international relations its very safe. You have much more to worry about if you are a Chinese national resident in the US, which is what most of the warnings seem to allude to.