I don't know if there's really a good answer to this.
Back in the day, it was considered "common courtesy" and/or "gentlemanly driving" to give up the position to someone your actions resulted in them wrecking. ... Regardless the circumstances.
Unfortunately, not so much today - as the "plow horse" type drivers outnumber the rest of us. I can't even remember the last time I heard a race director black flag someone, or chastise a driver for rough driving.
While I can count on one hand, using two fingers, the number of times I've had someone show any courtesy or pull over to allow me to regain my position in the last year - just off the top of my head I don't have enough fingers and toes to count all the times I've been crashed and even had my car broken during the same period, and not a peep from the guilty party.
Matter of fact, a few months ago I actually had instances two weeks running in which a race director, who just so happened to be running in my heat, wrecked me after I'd passed them cleanly (once when I was lapping them) - the second instance of which I grumbled something on the driver's stand, to which they responded loud enough for everyone to hear, "I don't move over for anybody."
So as a result, unfortunately, I've been forced to take a bit of a change of attitude relative to my own behavior on the driver's stand. A lot depends on whom I'm racing against, as if it's a club race I generally know the cars of my competitors - but, being as since (as a general rule) I'm not given any courtesy any more by my fellow competitors, I'm not going to give them any quarter either. I hate saying I've taken to this, but it's a matter of if nobody else cares then why should I........