The butcher of the street

Like all slaughterers he was born under the sign of Mars.
He used to say:
I thought I'll be a murderer,
But I repented.
I kill by law.
After a hundred and twenty years
I'll be the slaughterer of Paradise.

Background: he was the second butcher of the street- there were some of them. Actually they were called: ritual slaughterers.