You misunderstood him. He wanted to say that he is a black. Look here.
He come out with an argument that your move was kind of an accident this way:
[db`NiColaS-Fr] lol you luck d

Here he pretends that he finds it funny:
[db`NiColaS-Fr] xd

but then he show that it didnt satisfy him:
[db`NiColaS-Fr] damm

And then (important part) you raise a question on the subject of who he is:
[skOrp-zito`eS] and u?

By responding to a question, he noted the fact that he is black:
[db`NiColaS-Fr] n@#!!!

And then you have insulted him without any reasons on that by "racist" since its not racism when somebody call himself n@#!!!.
[skOrp-zito`eS] racist

Ill conclude this: scorpus, stop insulting without reason on tus games!!! XDDdddddd

Hah why you are so agressive xD
saying you aren't insulting and then saying shut up, you should check out whats sarcasm is, niko didnt called you n@#!!! lmao, he have not the best english and the stuff he said was just kind of result after raging, in fact he have no clue if you are black or or white or maybe even green, he didnt mean it the way you understand it..

@Kaleu, i cant understand u.

Tu não é preto, é marrom, não negão canela fina XDD

I mean that u not n@#!!! what different could I mean?? lol;