Yeah, assuming her feet don’t smell I’d have no issue with her cutting her nails on the train-- if she was catching them with a plastic tray, baggie or even a napkin so they don’t fall on the seat someone else is about to sit down on. But she’s not doing that, which is gross and disrespectful to your fellow passengers, IMO.
Tell me you weren’t paying attention to US politics in 2008-2010 (which were the two fucking years of nonstop backbreaking fucking effort it got the ACA to be passed) without telling me you weren’t paying attention.