AITA for calling my sister selfish and immature?

For context, about 3.5 years ago my sister came out as transgender (m to f) and moved out of the house less than 24h later. She refused to tell my mom or dad where she was living and expected me to keep the secret. My parents knew she came out and accepted her fully right out of the gate, no questions asked, and were confused that she didn’t want them to know when she lived. Eventually, she let my mom know where she was living and now they have a great relationship. I kept my promise and never told my parents or anyone where she was living. Throughout these 3.5 years my dad has been extremely respectful of her privacy and her wishes to not have a relationship; ofc he still loves her and will text her occasionally to say happy birthday, how is school going, etc. to which my sister will send a thumbs up as a response. To be clear, my dad is respecting her boundaries although he doesn’t understand why my sister thinks he is not accepting of her.

This thanksgiving weekend my sister came back home to visit and as usual, expects my dad to be out of his own house the entire duration of her visit. My dad has been staying at a hotel and truly doesn’t mind as he wants to respect her wishes.

I am bothered by this and think it is stupid that he should have to move out of his house every time she visits, specifically because my sister refuses to talk about or explain her reasoning for hating my dad. My dad has always been awesome to both of us, supported us through mental health struggles, taken us to our favourite concerts, supported us financially, etc. and I truly do not understand what she has against him.

AITA for telling my sister she was being unreasonable and she should be the one staying at a hotel during her visit? AITA for telling her I’m done talking to her until she will have a mature conversation about why she hates my dad?

Here is where I think I am the AH: I understand as a cis-woman my relationship with my dad and the world around me is very different than my sisters and I might not be acknowledging her feelings or taking into account the intersectionality of her identity.