The same behaviour was shown towards Russian athletes with regards to the invasion of Ukraine. Judging by your logic that would be, idk, anti-orthodox? Russophobic? It’s symbolic and has nothing to do with the their opinion of the people they are competing against. It’s not antisemitism, plain and simple.

Top left looks best as a default wallpaper in my opinion. Nice mix of colours, not too bright or too dark, and generally seems appealing while not being too distracting.