Ditto, he stole millions. He's barely repaying!!
How do you know? What will it take to prove in a manner that's acceptable in a court of law. It could be extremely protracted. That's where plea deals come in.
Since extradition was involved here (not sure on what grounds) this might involve only crimes that occurred in Israel rather than the EU. If this is about the incidents in the EU, I would assume Israeli courts would be extra careful, so as not to jeopardize the ability to have Israeli citizens sent to Israel for trial by agreeing to a ridiculous plea deal.
On the surface this sounds low, but due to above issues, I would guess there's more to the story.