I think that if you read up on the origin of the word you would see that it was originally used in a negative way. Some people may not find it offensive, but that doesn't mean the offensive interpretation is new.
And it doesn't matter how the word was used in 1930. Many words were commonly used then that are now taboo.
Also, no court can do anything about this. There is no civil liability. However, Congress could threaten to revoke the nfl's status as a nonprofit. Then the league would force Snyder to change it.
A word is only offensive if the person saying it intends for it to be offensive or if the person hearing it takes it that way. Native Americans referred to themselves as Redskins before some white people that hated them started using it in a derogatory manner.
On the job I have been called an SOB more times than I could count and never in a hostile or negative manner. Never made me mad in the least. On the street if somebody calls me an SOB in a hostile manner they better be ducking as soon as they say it. Almost any word can be offensive if it is delivered in and offensive manner.
Maybe there are still some people that have racist feelings toward Native Americans but I have never known any of those people (not one). Never heard a single person in my life call somebody a Redskin in any kind of derogatory manner at all. In fact I can't remember ever hearing anybody say anything negative about Native Americans at all. If I did I would remember it because I would have taken offense to it myself.
There were a few full blooded Cherokee kids that went to the school I went to. Not only was there absolutely no racism toward them but I think they were actually more popular because they were Cherokee. My brother dated one of them all the way through high school. Her part time job was to dress in Native American attire and take pictures with tourists at a local tour cave. I highly doubt if any of those tourists would have gone out of their way to come to this area to learn about Sequoia and have their pictures taken with a Cherokee girl if they had bad feelings about it.
Some people today are just looking for a reason to be offended and pissed off, and others make a living out of reminding people that they should be pissed off, even if they aren't.