I am a regular 'heavy' visitor to JFK from Europe and nothing about that R/T clip surprises me. JFK controllers are aggressive on the radio, both on the ground and in the air. Whether it is a cultural thing or just plain macho BS they are amongst the worst controllers I have come across worldwide.
Having said that.... when I line up and see weather impinging on the departure track.... you stay put until you negotiate a better clearance.... no matter how much pressure JFK tower is putting on you to get airborne. Aer Lingus is not entirely blame free in this episode.