He can be pissed, but don't start yappin at the mouth about "measures" and holding summits to discuss this incident. There isn't shyt they can do about it. Suck it up and stop crying.
And yes, if you offer snowden asylum and try to fly into air space that has extradition treaties with the US, than your plane is coming down. Doesn't matter who the fukk you are, even if you're a president from a no superpower nation.
You do realize the European countries broke all types of diplomatic norms and conventions right? A presidents plane has total diplomatic immunity. What they did was unprecedented and disrespectful from a diplomatic perspective.
And the guy was not even on the plane. It's a disgusting abuse of power. Might doesn't always make it right breh. Diplomatic norms and conventions have to be
Respected.