Could you please cite the source where you read that many furious Mao fans are showing their anger at Kozuka's fan thread?
If you are talking about his major fan site,
Go Takahiko!
http://takahikokozuka.com/top.html
I do not see any such posts between the date of the Worlds and today. According to the guidelines, the administrator checks all the messages that are sent to the fan board before accepting to let them appear on the board.
http://takahikokozuka.com/notice.html
Their guidelines sound pretty relaxed in that they mention nothing about manners but the issue of copyrighted videos. Yet, it is hard to believe that the administrator would have accepted any angry messages directed at Kozuka's father even if anyone has ever sent such messages.
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