Dude, If someone went to Chinatown and in city, I'm sure only a few of the victims would be Chinese nationals, and the remainder would be Americans. The same for any and all communities that are gathering grounds for people that share an ethnic bond, whatever the nationality.
Admitting? I assumed that he was proud of the fact that he'd killed all those people.
Does he have a right to live? Mass murder isn't a capital crime? He's already arrogated to himself the state's power to deprive people of life - after a fair trial & upon being found guilty of murder, & sentenced by a competent court. & it is Texas, after all - & as a native, surely he was aware of the near-utter abandon with which the state of Texas pursues capital punishment. I assume that the state has all the evidence it needs to successfully pursue a murder one case, several times over. The witnesses are there, the accused has confessed (I assume).
Unless he or his lawyer pleads insanity, I don't see much future for him. (& in Texas, I'm not sure that a plea of insanity would be that helpful. We'll see, I suppose.) & just to set any minds @ ease - I don't care what the accused's politics are. It's ridiculous that people can't feel safe in living their life in a shopping center. So regardless of his race, sexual orientation, religion, what-have-you that he may distinguish himself by - I want him tried, & if fairly convicted of a (or a series) of capital crimes, his sentence should be carried out.
Mind you, even if found guilty of various charges of murder one, & sentenced to death - it will probably still take years to actually carry out the sentence.