No one, of course, has permission to do anything at Barclays Center without the OK from Joe Tsai, the cofounder and executive vice chairman of Alibaba who became 100% owner of the Brooklyn Nets in 2019. The cement blocks outside his building have become a canvas for those who feel their voices have gone unheard. Tsai empathizes. So long as it’s peaceful, he is a champion for those protesting at Barclays. “Those of us who cannot possibly experience the personal pain and indignity of racism towards black people feel a sense of helplessness as frustration and anxiety reach a boiling point. But it does not mean that we sit idle,” Tsai said in a statement to The Daily News.