antikifira: seems like you missed my point. We have bechira to do good or bad. The person who killed Rabbi Abuchatzeira had the choice to attack him or not. He chose to attack him (with the intention of killing him). Yes – apparently it was also Rabbi Abuchatzeira’s time or Hashem wouldn’t have let him die even though he was attacked.
If you held a gun and shot at 100 Jews- chas v’shalom – that would have been your choice (an evil one) to do so. Whether anyone would have died in that shooting would have been up to Hashem. But you would still be accountable for you actions.