I hear you. My beast did that too. It would twist anything it couldinto a way for me to cave in. Early on for me it was anger also. It will change tactics, but it does quiet down (or we get better at ignoring it). Point is, it gets easier.
So your BP would look like?
I will never binge eat again and I am not changing my mind.
Or
I will never binge eat and purge and I am not changing my mind.
Or are you thinking another wording?