AITA for telling my dad I wouldn't be donating a kidney if he was denying my siblings of their inheritance?

I (24F) am the youngest child. I have 2 siblings. I've always had a good relationship with my parents and had a fairly good relationship with my siblings when I was younger. I was pretty indifferent when I got older as I spent a lot of time with my friends and I never really liked what my siblings did. It's not drama. It's just they are not my type of people. I was never close with my eldest sibling and when I was younger I would help take care of my other sibling. We aren't close but we can tolerate each other. I am just as far away from family as I can be without moving out of the state. I went away for college and when I graduated I moved away from my family but I am not far enough to warrant not visiting often. I feel obligated to be a good daughter. It sucks but I know it will make my life easier. I just try to find ways to minimize the time I have to spend with them.<br><br>Back around March or April of last year my dad was diagnosed with a really bad kidney disease. The doctors told him that he could eventually end up needing a kidney transplant. A few months ago he started to have problems with his kidneys. He was in a lot of pain and the doctors told him that he needed a transplant. They put him on a waiting list for a transplant, but they need living donors in case he doesn't get a transplant in time. In November they reached out to all of his kids and we all got blood tests. My eldest sibling is the only match. They told my dad that he was pretty bad and needed a transplant as soon as possible. My eldest sibling agreed to do it.<br><br>Then in January my grandma passed away. She left me around 20k dollars. My siblings got nothing. I was surprised that I got money. My grandma had spent a lot of time with me when I was younger since I was the last grandchild and she wanted to spend her time with me before she got old. I never expected to get money though. I was very thankful. My siblings didn't care much, but of course my eldest sibling did. They went to my dad around February and told him that they wanted money for the transplant. My dad has a lot of money from his 401k. It will be passed down and divided between us after he dies. My eldest sibling wanted money to pay for the transplant. My dad agreed to it. My dad paid my eldest sibling around 50k out of his savings account. I was okay with that. They were going to get it eventually if/when my dad dies. This was just earlier than expected. They were going to have major surgery and they deserved to have their finances taken care of. <br><br>Around the time I got my money from my grandma I realized that I wasn't just money. It was a portion of her life spent down to nothing. I realized that I was putting too much emphasis on money and that I was not letting myself live down to nothing. I started to change my life a little bit. I started to take better care of myself. I realized that I was being stupid by spending so much time with my family. It was making me miserable. I was finally okay with just ignoring them and stopping myself from feeling obligated to be a good daughter. I just went through the motions of visiting my dad but I realized that I was being stupid so I stopped. I've cut my visits down to less than 3 times a month. I finally started to start living my life how I want. I've cut myself down to barely any interaction with my family. I've spent more time with my friends and other people who I care about. <br><br>A week ago my dad called me. He told me that my eldest sibling was getting cold feet about donating. They told him that they were going to back out. My dad begged them to stay but they refused. My dad told me that since I was closest in age to him that I should donate. I told him no. He asked why. I told him that I was the only one who hadn't got money from our grandma, he had paid my eldest sibling for the transplant, and he was denying my other sibling of completing his education. My dad went silent. I asked him if he was still there. He said he was. I asked him again why I should donate. He said that he was our father and we owed it to him. I told him that my siblings deserved lives. He asked me what that meant. I told him that my siblings deserved to live their lives and not have to worry about money. I told him that my siblings were robbed of their inheritance from their grandma. I told him that he had spent money from their inheritance for my eldest sibling to get surgery and he was denying my other sibling of completing his college. My dad got really defensive. He told me that it wasn't my business. I told him that it was and that I was refusing to donate a kidney until I knew that my siblings were okay. My dad got mad and told me I was a horrible daughter. I told him that I wasn't a horrible daughter but he was a horrible father. I hung up the phone.<br><br>My dad has been texting me and calling me nonstop. I eventually got so frustrated with the amount of texts that I blocked his number. I told my boyfriend and he is on my side. I told my friends and they are also on my side. I told my big sibling and they are pretty mad at our dad. They told me that they are hoping that our dad dies. My other siblings are angry at our dad for trying to make me donate. They told me that they are really thankful for me and that they love me. I told them it's no problem and that I love them too. I'm just worried that this will make my life hard. I'm scared that I will regret my decision and that this will push me away from my family further. I'm not sure if I should have told my dad that I would donate.<br><br>Edit: I want to say that my youngest sibling was not given any money from my dad because he wasn't big enough to donate. It's not because he got money from elsewhere. My dad did want him to get money but he doesn't have money to pay for school. I should have worded it better.