OP I really feel for you. There really aren't the words to describe this person - I've rarely been so shocked than at your first thread.
I would not meet him, no. As others have said, if it were a case of him 'coming to his senses', this wouldn't be the approach - he'd be on the phone apologising for his behaviour, trying to explain himself, upset and ashamed at his frankly disgusting reaction.
As he isn't, I suspect that were you to meet it might turn into quite an upsetting encounter, and you don't need that right now. Worst case scenario, he may indeed end up provoking some sort of argument so that you end up throwing him out, then he can justify his behaviour to others. Best case scenario, you get treated to a series of whining explanations, all of which simply underline the unpleasant fact that the man you thought so much of has turned out to be a shockingly selfish, cruel, me me me bellend. I certainly don't think there's anything he could really say which could convince you that he had good reason to treat you as he has, so I just think you'd end up massively upset by him. And if he were to turn around now and declare that he'd be there for you, would you want him to be? Would that give you peace of mind, or would you end up hesitantly allowing him to play the loving partner while you go into your op with a new layer of stress to deal with as you wonder whether he'll turn on you again? Right now, I wouldn't let him near partly in order to avoid that situation alone. You are better off relying on your family right now.
In addition, is there any pressing reason to meet him? Of course you will want to at some point, but the fact of the matter is that sadly he has shown so conclusively what kind of a person he is, coming back from it must be nigh on impossible anyway. Several posters have talked about not judging too harshly/giving him a chance to explain - but how? What possible explanation could there be apart from - this is him, and it's not a pretty sight? Something often heard on MN is 'When someone tells you who they are, believe them.' When crunch time came... this is who he has shown himself to be.
I wish you all the strength you need for your op and although I'm sure you will need to meet with him at some point, I hope you are able to ignore him and his selfish cruel behaviour for as long as you need to heal. That is far more important.