Well, learned something new again. I didn't know or think of types of behaviour coming from the bull genetics.
Can't quite picture how bad the cows toss their calves. Oh I believe you, just have never seen anything like that. Ours (not Angus) will maybe nudge their calves to sit up and get moving, which I like, it stimulates.
Be great to see a video of how bad your cows treat their calves, sure, I realize, calving is done and that is not possible.
Guess everyones measure of cow behaviour and what is acceptable is different. If it makes YOU feel uncomfortable to be around........ off they go. There are too many things to worry about as it is, to worry about a calf being killed/hurt by it's mother intentionally.