Drop ordinance on them.
theres probably an ordinance against pulling down Greek border fences. maybe they should make arrests.
Does the Greek military not have should-fired anti-tank weapons? That thing should have become a smoking wreck the minute it started pulling down the fence.
And if the “migrants” - Read that “Fighting Age Moslem Males” - want to continue to try and cross a sovereign border where they’re NOT WANTED, then some 7.62 NATO applied judiciously from SAWs will discourage that.
Every single culture has the Right to defend itself from invasion. And this is the just the latest attempt by the 7th century savages to invade again.
The Turks would be gone before the Greeks could pass an ordinance.