Fans have short attention spans.
It may have originally started as a racially fueled reason to boo him.
Now they are doing it purely because it's 'the thing' to do and it gets under his skin, his reactions to it are proving that.
Same way people were booing DCE. Difference is DCE comes out and says it doesn't affect him and he is sure in time everyone will get over it. Whereas Goodes has been pissing and whinging about it making it more of a reason for the fans to keep digging at him.
What people also dismiss in relation to the celebratory war dance is, he directed it directly at the opposing fans. Now what sort of reaction is that going to promote? Well of course it's going to be somewhat antagonistic. Unfortunately what should have been seen as a proud cultural celebration was seen as incitement and targeted when it shouldn't have been. GI doesn't make a point of rushing off to the nearest opposition fans or opposition fans bay, he just celebrates instantly.
No one in the NRL has an issue with any celebrations or the Haka for example, but they aren't targeted directly at opposition fans are they?
It reminds me a little bit of the Adebyaor goal celebration targetting the fans. It was always going to incite the fans.
Obvious that there is certainly a big element of racism that started it, but now they are just targeting him because it gets under his skin.
He shouldn't have to be silent on racial issues. However if he just shutup and play footy or made mention that it motivates him to do well against their side and win the game it would lose traction with fans much quicker as it would get boring for them to continue it.