Important TL;DR: He's making himself out to be the victim while victimizing you (he's holding you accountable for his actions and feelings). Don't stand for it and be prepared. Because he views himself as the victim, he may try to lash out at you physically (he's already doing it psychologically) or cause destruction within your personal life. Be very careful with an emotional abuser. This guy may not be just an ***hole -- he may very well become dangerous or destructive.
My original response:
Wow, just wow. If this is something he can't deal with, that's his problem and not yours. For him to turn it around and shame you for this is textbook psychological abuse. He has some serious hang ups to deal with. For example:
"I wanted to make love to you but you sat in a piss-filled diaper for 7 hours."
He's making it YOUR fault that he didn't want to "make love to you". If he doesn't want to do something, then that is his choice and not yours. If he had a problem with this, he could have brought it up or asked you to shower, etc. This is classic shaming and guilt tripping you for his actions.
"I'm just disgusted when you shit yourself"
See? It's YOUR fault again. He's making his personal feelings of disgust your fault. If he didn't like it, he should have said something about it sooner.
"I'm just shocked"
Again he's blaming you for his feelings. Nope, his feelings are his fault, not yours.
"I wonder if this is healthy"
He's trying to make you feel like there is something wrong with you so that you'll accept that his feelings are your fault.
"You were this strong, independent woman, and now...this."
Again, he's "making you less".
Quite frankly, his responses are emotionally immature. He's refusing to accept any of his own responsibility for his feelings, and that's a fundamental component of someone who is able to have a healthy relationship. He likely needs therapy.
There is nothing wrong with who you are. His opinions on anything are his and his alone. He may look for others who agree, but it still doesn't make it anything other than a subjective opinion. I'm hesitant to give advice on relationships, but if I were in this situation, I would be out in a heartbeat. I've dealt with enough psychological abuse to know what it looks like, and I have a strong feeling that this behavior will only get worse if you concede to him.
https://www.verywellmind.com/identify-and-cope-with-emotional-abuse-4156673
I would recommend not conceding, pointing out his feelings are his to deal with, and if he doesn't like them then you're simply not compatible - there is nothing wrong with anyone in this situation. If he can't accept that, he needs help. I would also recommend bringing people you trust who know about your inclinations to go with you any time you need to interact with him in person. This may be an over reaction, but as someone who has dealt with psychological abuse in the past - and the abuser's notion that their feelings are someone else's fault - this is usually an indicator of a broken ethical code that depends on zealous retribution to work. That said, be prepared for backlash from this ***hole.