So from one perspective we can't let terrorists/freedom figthers (depending on how you look at it) win, and want to keep air traffic flowing.
From another, MH17, they should have stayed out of "the war zone", or been routed around it.
In my opinion those two regions are in the same mess, and I have a feeling both Ukraine and Israel, from a political standpoint, don't like the idea of having terrorists/freedom figthers win by shutting down the airspace.
Now the question is, do we really want to see another aircraft shot down, carrying innocent victims (even though people travelling to Israel may know the risk) Simply because a gonverment want to make a political statement?
Controversial??