As the person who pushed buttons after discussing this internally with the Community Management team: no, you can't.

I could repeat several points Shog made in this answer, but suffice to say, it covers public figures and this case too.

You're allowed to express disagreement and condemn actions, like the message said, but please don't fall into personal insults. Your profile is still allowed to be political (and most of the things in there are far more political than the specific sentence that was removed) - but that sentence falls outside of the Code of Conduct and was therefore removed after being reported.

I'd also say something else.

It takes no amount of courage to mount a soap box, far away from peril.

While I managed to avoid local politics (the prospect of that does frighten me a bit), I recently had the opportunity and privilege of speaking of a matter of relation to this community during a video call.

It scared the **** out of me, and I was nerves the whole day. It was important to me that I get my message right and I hope I did ok. I mean, if I screwed up, it would just make me look bad, and maybe ruin mod-company relations. Nothing too bad.

That was... relatively nothing compared to the risks that many folks face.

There's folks who risked their lives to reveal the truth behind actual genocide, to the point of actually inflitrating a concentration camp

This young lady was shot in the head for campaigning for equal access to educational rights

You uh... are complaining that you aren't allowed to use a privately owned public space as a soapbox. In the most polite terms possible, I would say that your efforts are roughly the equivalent of throwing bananas at a tank. The tank's not going to get hurt.

What concerns me as a user though, is frontloading of profiles with terms explicitly meant to trip off censorbots with the express desire to get parts or all of the network blocked. The desire for collateral damage is unwelcome. Saying the Chinese president looks like Winnie the Pooh, as we both know, is something that's a bit of a dogwhistle for people who don't like him, and has been known to trigger censorship filters. You're hurting regular folks more than the Chinese government. To quote your own website

The campaign has centered around publishing censored keywords on his Stack Overflow username, thus using his considerable Stack Overflow presence to sabotage the website in China. Here is an early web archive.

I guess a good meatspace equivalent would be a privately owned grafitti wall. The owner is fine with people painting on it, but the owner is also within their rights to go "Hey, that's in poor taste and needs to go away".

Real change and revolution needs direction. We don't need people doing the metaphorical equivalent of blocking Clemenceau Avenue to protest American or Chinese aggression. Maybe you want to spend all the energy complaining about us here, somewhere where it might do more good.

Maybe find a free speech-centric social media platform you enjoy and build it up. Support outlets that help get the real story behind genocide out, even if doesn't mean risking your own life in some horrible place.

Basically, if you want real change, your current approach just.... annoys people. It doesn't affect the folks you're mad at at all. Go get out there, and... well change things.

I understand what you are saying @Ciro. I read this post the same way I read your profile page as it changed over time. The essential issue at hand is freedom of expression -and censorship- in our user profiles, it's a two-fold issue: 1º form, 2º content.

In terms of content, you would agree that offensive imagery is not right (pick something that offends you the most). Folks wouldn't appreciate certain pictures by Gustave Courbert in the user profiles, neither would selected quotes from Truman Capote or Henry Miller be appreciated. (And here we could still says: "it's art.")

In terms of form, I'm lucky enough to live in a democratic country. But if I call the elected president: "an idiot" I'll be arrested and fined. I can criticize him all I want, but I can't insult him.

The "take away": you can't do everything you want. There are rules to the game, and sportsmanship is playing within the rules.

Now, taking it a step further... If you want your user profile to be your personal platform, be it for gains (like "buy me coffee", or to promote your projects) that's fine. It's also fine to make a political statement, but as is usually said: "the ends don't justify the means". Using insult (name calling) as a mean is not allowed for whatever ends. That has been a staple of SE and I agree with it, for the simple reason that civility in our conduct is an essential mean (and curiously can be an end in itself).

Nobody cares

Nobody comes to Stack Exchange (even on Politics) to hear anyone's opinions on the Chinese Government, current or former US presidents, or anything else like that. I'm sure plenty of people care, but not in this context.

For instance, regardless of my or your stance on the Monica issue, I think putting "I support Monica" in your username is cringe. What you've done is worse because it's completely irrelevant to the topic of the sites. And that would be the same whether it were "I hate China" or "I love China". It's obnoxious and uninteresting (in the context of this site). If your user were a question, I'd flag it as rude or abusive and off-topic.