Does Greece has an anti-Semitism problem? Yes, unequivocally. We also have a much bigger Islamophobia problem. Beyond that, the "rankings" are meaningless.
In terms of policy, our government is one that straight up kills migrants at sea and allies itself with a genocidal apartheid regime.
The people taking action here did a good thing. It's people like this that save Greek honour.
Unironically, admitting Israel, Palestine and Lebanon into the European Union might actually be the solution to this whole fucking clusterfuck.
Edit: major major reforms should take place of course, and Israel should dismantle apartheid and pay reparations, while Lebanon should dismantle the sectarian dysfunction of their government, but as a long term horizon this region needs the wildly successful EU model of peaceful pacification more than any other region in the world.