Taken some time to calm down and will try to communicate my thoughts more peacefully..
First of all, I do not dislike any breed.
I don’t dislike whippets.
What I was trying to say is that the typical whippet play style is perceived as very threatening to most dogs, even if no threatening intent is there.
Whippet play typically involves a lot of high intensity chase, nipping, body slamming.
Most non sighthound dogs will not recognise that as play.
Because that behaviour is perceived as threatening I do not think owners should be allowing their dogs to exhibit it.
If that means not letting them interact with other dogs of different breeds then so be it.
I don’t think a muzzle is the answer because it doesn’t stop the other attributes that dogs find threatening and because a muzzle absolutely can hurt.
In fact, muzzled dogs can actually break other dogs ribcages by ‘muzzle punching’ them.
On the day of my dog’s incident it was abundantly clear the owner saw no issue because it was ‘play’ and the posts the OP has made have a very similar vibe to me, and that is both deeply upsetting and makes me really angry because my dog is now incredibly anxious and troubled.
The owner probably has no idea just how deeply her failure to call her dog back has traumatised my dog.
So I would urge you, please, to recognise that while your dog is friendly and has no malicious intent, it’s behaviour is unacceptable and it is really scary for other dogs and it could cause far more damage than you realise and just slapping a muzzle on doesn’t fix the problem.