For convenience, here's a link to the Uber help page for deleting your account: https://help.uber.com/h/24010fe7-7a67-4ee5-9938-c734000b144a
(They even give you a nice box to explain why)
Both Lyft and Uber didn't suspend service to JFK last night because both are 24/7 platforms for anyone to drive and make money. Uber lowered/suspended surge pricing to make it affordable in/around the protests, while Lyft did not.
Worth noting is that active drivers on both platforms were likely protesting at airports all over the world.