How ethical raising prices is under these circumstances is not what is at question. I don't know why you keep raising this.
To be clear, Uber broke a strike in support of the immigrants and refugees, advertising that they were doing so. Taxis drivers stood in solidarity with the immigrants and refugees by halting service in and out of JFK. Uber sent drivers there. Surge pricing was just an implementation detail of their being scabs.
If you want to argue on behalf of Uber breaking this strike, please, go ahead.