But I think there's more to this story....
I wonder if there was a sign reading: "In case of Rapture this plane will be without a pilot," so maybe it was a good thing? Really, this kind of thing has to be done with sensitivity. It could be regarded as rash and intrusive. I'd feel uncomfortable if the pilot was Jewish and exhorted the Jewish passengers to proselytize in this manner.
How do you think folks would feel if this pilot had said: "Gee folks, I've been in a clinical depression for a few weeks and I think it'd be a really good idea for the Christians to pray like mad during this flight....."