Attacked

"Murderous action" implies a pre-meditated act intended to kill you - my argument is that this is very very rarely the case.

Then let your response be proportionate.

That is not the same as cycling of with a smug sense of zen calm - just an acceptance we all [do] stupid things sometimes.

And it is best not to reward these stupid things with respect, especially when these stupid things kill and injure thousands of cyclist every year.