It's up to you whether you get offended or not. If you are called it at work, by an employee of a company when going about your daily business, in the press etc., I should imagine you have recourse to complain and/or litigate aganst the perpertrator/company. Is there a crime of racially...
Quite simply, they are not allowed to mention race, religion, sexuality, disability etc. It is part of the FA laws. It's not about degree or context, it is simply a 'don't do it' issue. It really is that simple, yes?
I think another aspect worth considering here is that pro sportspeople are always pushing boundaries regarding trying to bend or circumvent rules to gain an advantage to win in their chosen sport, and as such, might think the same mindset can be used on social media, along the lines of, 'I'll...
Quite simply, they can't refer to a anybody's race or religion, as well as numerous, well known other personal traits, along the lines of disability, sexuality etc. It's not about being old fashioned etc., it's just a blanket 'don't do it' edict. If they are dim enough to transgress against it...