Request for closure of abusive youtube account

It recently has come to my attention that a frequently abusive user on youtube by the name of Brainman94 has posted a derogatory video regarding Ayrton Senna, perpetuating an event that occured with a theory that holds no truth at all.
In my opinion the video is not only disrespectful towards the Senna family but also towards his millions of fans out there many users have commented on his page regarding his behaviour towards other youtube users which is completely unacceptable, yet this person continues to disrespect and hurl abusive comments with no provocation whatsoever.
This person by the name of Brainman94 has also repeatedly made racist comments & continues to do so, by reguarly posting on other videos to deliberately rile other users for their own satisfcation.
I have flagged their posted video twice however fear Youtube can not recitfy the situation first hand, so I have created this petition in order for users to take a stance who have been subjected to his abuse.
I myself enjoy posting on youtube and think it is unfair for individuals as such to be allowed the freedom of speech in an outlet where they are causing strife and spoiling it for youtube users who follow the conditions and dont over step the mark. It is my wish to have Youtube follow up this petition and to investigate the matter because the behaviour of this individual undermines other users who make youtube the great place it is.
Please sign this petition as an example, I would really appreciate your support, thank you very much.