How is a Russian athlete flying a neutral or other countries flag a threat to their sovereignty

Do I really need to clarify that I meant one country, not one athlete, in the context of being a threat to a nation’s existence?

and how does that excuse accepting genocide and imperialist invasion just because you aren’t directly affected by it?

Countries tend to prioritize themselves over other countries. That’s kinda what countries are.

But regardless of whether it excuses it or not, it makes it not hypocritical. You can be selfish, and even immoral, without hypocrisy.