I won't say anything of the kind. But there is a huge difference between earnestly spreading the word of God and spouting off over a megaphone.
That said, here is my main objection to what the pilot did: if I do not obey the pilot when I am on the plane, I can be arrested for "interfering with a flight crew". The instructions of pilot and the flight attendents must be obeyed.
I have no problem with that as it is a matter of security; however, it obliges the flight crew to understand that mandate and not abuse it. Spreading Christianity to those who are required by law to listen and obey is not the message of Jesus.