He explicitly referred to Fallon Fox, saying "You are a fucking man." Not a very tactful way to speak about a transgender woman. And yes, that's transphobic speech.
This person was able to brutalize women because of attitudes like yours, where you are too afraid of using the incorrect pronoun even in the context of making a point about dangerous differences in physicality.
This person beat a woman until her skull cracked and you are hung up on someone saying she has the physiology of a man. What do you think sets the acceptance of transgender people back more?