When Iran directly, materially, and openly, supports groups or organizations that have as an overt stated goal to destroy Israel, and actively work towards it (both with indiscriminate attacks against civilians, and building infrastructure for future invasions/attacks), I don't think the war is necessarily 'unprovoked'.

We may say that it was unproductive, badly conducted, or a lot of other things, but saying it was unprovoked is like saying that Ukraine has no reasons to attack Iran and/or Belarus. They do have those reasons, because both of those countries directly and materially support their attackers. It just might not be productive to do so (and indeed, Ukraine seems to believe it isn't).