We have to distinuish between the formalities of the system and official policy with what people feel and express.
A government must of course strive to act neutral. It is a cornerstone of all bureacracies that they treat people based on objective and clearly defined rules.
However, what I or other citizens may feel towards somebody is an entirely different matter. I simply reject the demand that I have an obligation to feel the same kinship to non-Europeans as to Europeans.
That applies to the same reason I would feel more kinship with my friends, family etc than a stranger from one town over.
I think you are threading a bit too close to characterizing the fact that people have different affinity and relations with each other with racism or prejudice. It becomes a kind of glass-half-empty logic, where every time you do a good things for some person everybody else who was not that person immediately gets offended and calls you bad words.
Imagine buying your friend a drink at the bar and now everybody else in the bar lines up to accuse you of ignoring them and not caring about them. It is a very negative way of framing things. Doing something positive for Ukraine should not be viewed as dislike or hostility towards others.
The point is that Europe put in a lot of effort to help Syria and aided a lot of Syrian refugees. I reject the idea that because we did not feel exactly the same otwards Syrians as to our fellow Europeans we are somehow prejudice.
Who do Americans feel obligations to the most? Naturally Americans feel obligations towards other American states over say obligations towards Argentinians or Japanese. That Europeans should feel obligations towards a fellow European country does not seem odd to me. We share a long history over thousands of years together. We share culture, language similarties etc.
All Europeans are a mix of different European people who have traveled all around. People have relatives across different countries. Ukraine has alternated between being Polish in the past e.g. Ukrainian cities have been Polish cities. Languages have a lot of similarities.
