Israel OTOH, would be a stretch from a geographical POV, but would fit right in culturally & economically as well as being small enough not to change the dynamics much. But as mentioned before, for the EU to officially consider Israel as a candidate there must be an iron-clad and permanent solution to the Palestinian conflict first. And the US, EU & UN all tried to mediate a solution, and all failed...
* I wouldn't let the Ukraine in any time soon either f.e., at least not until their economy is at a decent level and their parliamentarians stop getting into brawls
So... Israel won't ever join. Seeing as a lot of people don't seem to want any sort of peace.
Heated debates often get a little too heated in just about every parliament in the world.
I remember not to long ago a British MP picked up a ceremonial mace. Unfortunately, he didn't hit anyone.
Then there's the Labour MP who punched a couple of Tories.