Ethnically-Russian-dominated part of Ukraine is Crimea (58% ethnic Russians, AFAIR) and that is all. There are Russan-language-dominated parts of Ukraine (including, for example, Kiev itself and most big cities).
I live in the Eastern Ukraine and I don't see any notable hysteria around. There was a kind of hysteria in 2004 about "they disrespect our choice" but the revolution of 2004 changed nothing. What I see now is apathy, depression and fear of Russian invasion and war. Normally a person from Eastern Ukraine doesn't care much about any ultras in the West or even happy if they kick some b5tts of some corrupted officials. The hysteria and hatred comes from Russia - and I understand why it is difficult for the foreigner to distinguish the sources: they are much more numerous, aggressive and well-organized.