it's a rather different situation. There is no equivalence.
Not that European governments have supported any violence (or even the protests). They've called for Iran to allow dialogue and not to use violence against the protestors. And otherwise kept a watching brief.
Remember the last time there were major street protests in Iran, the regime used massive levels of violence against the protesters. Including sending out masked Revolutionary Guards paramilitaries on motorbikes with big sticks and guns - and imprisoning and/or torturing thousands - and "disappearing" quite a few of them too.