I did not see any "childish bickering over why a flight was cancelled". All that I saw was a question as to why the 'PFC to 'HH had been cancelled, which was replied to by LSM - who pointed out that it could not have been for weather reasons. No more, no less. Yet, he appears to be vilified for an informative piece of relevant factual information.
Judging from his previous posts, LSM has issues with BEE (which he is allowed to have), but I cannot see how anyone can get so upset with him answering a question with relevant information!
Apparently, the flight was cancelled for technical reasons. So, we have the answer to the question asked. LSM did not suggest that there was any underhand reason for the cancellation in his post about the weather.