No need for Iranian fans to justify the behavior of fanatics, just baffled that Iranians are so known for being polite, friendly and highly educated... and yet there's a generation of internet idiots behaving like this. I thought Italians on the Internet were the worst, but this is seriously a new low.
It started right at the time Iran joined the World League in 2013 and they started to become somehow relevant in volleyball.
Anyway no, this is not the first time it happened. It has nothing to do with Poland, all countries are a target. Remember Germany beating Iran in the 2014 WCH? Same.
It also has nothing to do with losing, Zaytsev became a main target after they beat us in Modena 2013 WL, it got worse as we "dared" to beat them in the second match. Nowadays it has calmed down as they obviously found new targets (also because they no longer beat us), I'm sure it will be 100% worse for whatever country will play them in the QF.
It also got nothing to do with volleyball, as Messi received an even worse treatment after scoring a goal against Iran in the football world cup, at the time they were writing stuff like "hope he dies of cancer" to his little kids' pictures on instagram.