There's no shortage of harmless anti-Trump social media posting throughout the world - how long before we read a press story covering someone who tweeted a tame criticism of the president being denied entry? Twelve months ago I'd have found the idea hard to believe; today, not so much.
Name one country that will grant you VISA if you start yelling similar things about their president.
If we start seriously saying "but it's okay for China to do it, why not us!" we've already reached terminal velocity sliding on that slope.
They're not insecure about themselves, as societies, the way America seems to be lately. So sensitive!
And phrases that might be critical of the President, but not enough to deny entry?
I'm curious to know where you see the line between acceptable and unacceptable...
There's all sorts of "harmless" things that could be on your Facebook profile that could get you rejected.
https://www.nytimes.com/2015/12/13/us/san-bernardino-attacks...
Twitter on the other hand is used far more widely with public accounts, and is commonly used as a platform for political discourse. The few "hate speech" style cases I've read (great example is the infamous "twitter joke" trial in the U.K.) have almost always stemmed from Twitter accounts. Instagram is similarly much more commonly used with public accounts.