This is the key point, everyone should be able to experience live football as they wish whilst also respecting those around them.
I first started taking my daughter regularly when she was 7. I knew that she would hear language that wasn't to be repeated in school and have never tried to sanitise the experience. However, I drew the line at an old guy constantly shouting "C*NT" from the seat behind. No context, no reason, just offensive. And yes, I had words and he chose to move seats. Had he not then we would have.
I don't know the guys discussed on here, but they sound like "lads". A bit loud, a bit in your face perhaps, but completely harmless and part of what we see at grounds up and down the country. It may have felt uncomfortable for someone starting to go to games, and probably very different from what would have been expected in the South Stand! But they were literally hundreds of empty seats and if the poster was unwilling to have a conversation with the group, and I can understand why he wouldn't, then move over a block or two and carry on enjoying the game.
We can do more to make the game even more inclusive, and it would be a shame if anyone didn't return because of how they were treated. But, at the moment, there is plenty of space to allow everyone to find what suits them without worry too much about others.