Arianna,
I lost my dad 34 years ago, and I was always a disappointment to him, only reluctantly following in his macho footsteps. As he was before he got sick, I don't think he could have ever accepted my transition. He was not physically abusive, but, with my sensitive nature, I was terrified of his verbal abuse of my mom, sister, and me.
Yet, according to my mom, when he saw his fate staring him in the face (terminal brain cancer) he turned himself around and became one of the nicest of people. I was still keeping my distance in those days, so I didn't see a lot of it. What I did see confused me back then, and left me with no words to say. I don't know if his new outlook would have embraced my transition, but that's water long under the bridge.
My point is, if I could have realized what was going on, I could have been nicer, regardless of his reaction. My advice is be kind, show love, and try to realize his point of view is coming from not understanding. I think you already understand this. Make memories, and try to keep them as happy as possible.
Be well, always be yourself, and remember there are lots of people who are always there for you.
Stephanie