I was on DL 159 in J and I noticed an elderly asian lady and her daughter sitting the middle suites near the front of the cabin. The elderly lady was recovering from surgery on her shoulder and her daughter was trying her best to help accommodate her while trying to not bother anyone. But, for no reason, the FAs became increasingly rude to them as the flight progressed. These ladies weren't being rude or bothering the FAs and I saw everything that happened on the flight having sat across the elderly lady in a window seat. They would ask for something like a water or possibly an extra pillow so that the elderly lady could position her shoulder and arm in a certain way, but one of the FAs literally said, and I kid you not, "If you want proper service, then fly Korean Air not us. Do you think that this is Korean Air?" to their faces. I tried to intervene and help them, but I would also get told not to intervene and these FAs would continue to be rude to even those who tried to stand up to what was happening. It was just upsetting that these folks who clearly needed some help in addition to those trying to help them would get shunned or disrespected by these FAs. Granted, I haven't flown DL One a lot, but I've never seen this ever in my life on a flight, especially when the passengers weren't being rude at all.

I'm not a Skymiles member but I was wondering how I could report this to Delta? It would make me absolutely sick if these FAs got away with this behavior, especially on a fourteen hour flight.