Fun chapter, with some relationship and plot movement. I will say it seems unrealistic for a knight to be bad with butchery, given what their job may ask them to do.
To be fair it's pretty normal for pickiness over certain food to show up on people because of experiences with said food while they were younger. There's no overblown distaste like some vegan people blow over these things, he simply has a strong stance.
Really, he's basically made his distaste clear, but he's clearly a very dutiful man as well. And so, just like how he is willing to simply swallow meat if need be, if he were to need to cut somebody down? If whole need were to show up? Then, he would likely do it.
...except, hey, here with how our witch showed a glimpse of shenanigans at play instead of being a clear threat, he's also shown that he is willing to hold and look for an alternative to butchering her down, has he not?