Non-neutral political phrases and terms in user profile and messages

Question

1. Example

user @bytebuster Stack Exchange profile (archive copy):

Since February 2014, Ukraine is suffering from Russia's armed invasion. If we fail to stop the Russian tanks in Ukraine, we would have to stop them in Poland, Baltic states, and finally, in your backyard. Don't wait till the last moment. The world has to stay together to stop Russian invasion in Europe as well as the Russian-equipped, Russian-trained, Russian-financed, and Russian-inspired terrorism all over the world.

Part of his answer in Travel Stack Exchange (archive copy):

At the moment, Russian language is associated with Russian invasion even though a lot of people still speak Russian. For me speaking Russian in Ukraine is like going to WWII occupied France(1) and trying to speak German with French people.

I think, that it contains non-neutral political phrases and terms.

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2. Questions

• 1. Is this @bytebuster content allowable for Stack Exchange sites?
  • 1.1. If no, what is best for users to do, who saw this content? Flag to moderators or is it better to do something different?

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3. My opinion

See @FactorMystic message:

I am completely uninterested in being badgered about social causes when I visit a site for expertise. I literally do not care what the cause is. I don't care which political groups support it even if those are the same as political groups I personally agree with, and I am disinclined to spend time here if on every page I have to scroll past some kind of social/political guilt trip.

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4. See also

• Please do not use Stack Overflow to promote social causes,
• If you're gonna talk Politics, you must respect those who disagree.

Answer 1

What users put in their user profile is up to them, as long as it is not illegal (within (international) law, accepted norms and customs, common sense) and still fits the be nice policy.
Something that makes you or anyone else uncomfortable should not be forbidden, a priori.

As for the answer:
To me it reads as an precaution to travelers using the Russian language and why it is so delicate, which is on topic on a travel site; it is what the question asks for and therefore is an answer and relevant.

Do note that the text is not from @bytebuster but from another answer, they are just paraphrasing.

To answer your questions:

Is this @bytebuster content allowable for Stack Exchange sites?

Yes, it is. And if it isn't remove the original as well.

If no, what is best for users to do, who saw this content? Flag to moderators or is it better to do something different?

I already said yes, but you could politely point out in a comment why the wording is causing friction. Maybe both the OP and the commenter can work out a different wording that still covers the intent.

It is unavoidable that on a travel site you sometimes have to address the political situation in a country to make sure travelers will be safe. If that can be done free from any opinion that is preferred. But it sometimes is necessary to address deeper emotions in an attempt to prevent escalation when on the ground.