Well yeah we can be creative about what it means to "accept" the result, for clarity on what it means to me then I would say that the vast majority of his opponents have failed to accept him winning. So if Trump losing is met with hysterical noise from his supporters, then I would say they too have failed to accept the result.

If violence is the measure, then the vast majority of his opponents have accepted him winning, and of course the same will be true if he loses. I think talk of 1000 or even 100 mass killers is fear porn of the highest quality. That's right up there with documentaries about Yellowstone Park.