not to attend the funeral of late Polish president Lech Kaczyński.
With all due respect as an airline pilot I disagree with your contention.
First of all Morocco was not in the path of the ash (a previous post points it out, the ash coverage map which changes by the hour).
Second of all, would you still call it bravery if all three engines of the Falcon were to flame out and the front windshields became impossible to see through? [ash is like glass/diamond particles which sand-blast the windshields]
The reason airlines are as cautious as the are is because of previous incidents.
Here is a British 747 which lost all 4 engines and miraculously restarted one or two at a much lower altitude; they didn't think they were even close to the ash.
Yes, I'm glad they were able to attend. However, they didn't put anyone else "to shame" as their geographical location was in their favor. I am certain that had Morocco been located farther north they would not attend.
I wish the funeral had been delayed by a week or so. In my view that'd have been the smartest thing to do.
PS. Off the subject - I've only been to Morocco one and it seemed to be a very lovel country and the food and the hospitality was absolutely great.