I haven't been following this too closely but have seen bits of the war dance after he scores.
Irrespective of him being Aborgiginae, Maori or from the Klan, I think everyone agrees it is an aggressive dance.
I have no problem with one expressing their culture and I have no problem if one celebrates with a war dance.
But it depends on who he is facing. If it's his own supporters then fine. Celebrate like that or any way you wish.
If however it's the opposition fans then it is a tad too aggressive and will provoke people.
Let's imagine Jacob Burns running to the Fever zone and doing that dance. I have no doubt he would get a nasty reaction.