that is sure, he has to get banned, i'd like to have his email also from admin, or some personal data.
He has to be banned if he threatened your life since that is against the rules.
But the admins are not going to give out personal data. Having his email address will probably not help either.
this not going to end on bitcointalk
That's not how it works. You can't respond to a threat by asking the admins to help you to attack them back.