I don't understand your point. You contested a fact "legally", but in your opinion the only authority that should have the final "legal" say in the matter is an impartial and weak one.
That's the best we have and it is better than random internet commenters who make judgement like they have a solid evidence of what's going on. Lastly depending on outcome this can be used for more fruitful discussions in the future.
It is not the best we have at all, and the choice is not between random internet commenters and the ICJ. You have the International Association of Genocide Scholars and a plethora of human rights associations.