apeiron75, looking back at all your posts I don't think i deserve the rolling eyes.
It could well be that the initial intention was to divert to JFK. This may have been changed due to the traffic situation at JFK and Stewart Intl offered instead. Do understand that in what was obviously a very busy time for the FD crew they may just not have had enough time to make a further PA announcement. The basics had already been made known i.e. you were diverting.