These things could easily end up in ECHR, because a "fascist", just like an "idiot", could be considered an opinion, judgement, not a fact and so it cannot be false, unless it means something very specific in Austria.
Which doesn't mean there aren't some stupid, backwards laws that have no place in today's society, like for example the blasphemy law which weirdly still exists. There will always be room for improvement and it's never wrong to question established rules.