@Coligno, oh, you know him? He's basically the founder of the Russian centre of Celtic culture, and the explanations for Russian speakers are written by his student (she's Head of the Department of Germanic and Celtic Philology at MSU now, as far as I understand — though I never studied at MSU myself so I can be wrong here).
Well, it's not that unusual for people to take negative information about their country's politics to heart (I catch myself feeling the same sometimes), but you're right, when it comes to Irish republicanism, the reaction is particularly bad. *
(...) where have you been learning phrases like "Up the RA!"?
I'm not supposed to tell anyone Seriously, though, maybe I heard it in a documentary or something (I think they mentioned these slogans in the documentary "Irish ways" [https://www.youtube.com/watch?time_continue=1&v=E-lm6bQEp6I ] — a very interesting one, by the way, because they interviewed both republicans and loyalists (and representatives of the British Army, and of course ordinary citizens). But I'm not absolutely sure, and anyway in Russia it's relatively easy to come across this kind of information: for example, one of the most popular Russian folk-rock singers, Хелависа, used to sing Rising of the Moon at her concerts (I remember this performance of her, for instance —
https://www.youtube.com/watch?time_continue=1&v=2ogjWwnVxgY , from 2:20).
*actually it's a relief that people think this way mostly because they are not well-informed (not that I claim to be well-informed myself but still) — I personally know Stalin's fans and people wholeheartedly supporting Churchill's
"I do not agree that the dog in a manger has the final right to the manger even though he may have lain there for a very long time" position, and it's much, much worse.