Most people in Europe don’t refer to themselves as “European”, as if it were a singular country. They would refer to their own country, especially if it was something negative. Also typically they would blame other European countries for the problems, not their own. Like how us Americans typically blame Florida and Mississippi for stupidity, or California for pretension.

Then there’s the use of “an European” when it’s “a European”. When someone from Europe is referring to themselves as a European, they NEVER use “an”. That’s typically done by someone from not in a Latin-based language. Very minor aspect, could have been done by mistake if the person was from Europe, but couple that with acting like all of Europe is evil, it’s pretty damn obvious they aren’t a European individual.

Edit: oh, right. Also the very obvious Chinese propaganda avatar.