We know that we have a Impact on others but shouldn’t the goal be to keep it a minimum?
Yes, completely agreed.
There is no delusion of a “zero impact vegan”
Maybe I misunderstood the person I was initially responding to, but I understood them as exactly that, when they said what I already quoted two times.
It's also not the first time I encountered this attitude. Maybe they don't actually believe what they say, but then my critique is directed at the wording. There is no zero kill diet (although plant based diets are clearly much less harmful than other diets).
Occasionally, some vegans bring up this idea and react very sensitive when confronted with how it's false. Maybe that defensiveness is fueled by cognitive dissonance which we mostly know from the other side.