No, I'm not obtuse. Are you ignorant of how courts carry out sentencing?
People convicted of crimes of violence are convicted for the violence, not the emotions.
If anything, proving hate adds another burden to the prosecution's case. Instead of just having to prove that the defendant clobbered the victim, now the prosecutor has to prove what was in the defendant's heart at the time. Of course, he has to prove it beyond a reasonable doubt. More opportunities for the defending lawyer to insert that doubt.