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Would you cut your sister out of your life if she did this ?

So basically my sister came to me and asked how I felt about her talking to our dad and I was open and honest and told her it's not a good idea not only did he abandon her when she was younger he is also a child molester and she has a child she needs to look out for. Well she ended up making a big rant 2 times on Facebook about how she doesn't care how family feels about it when she knows he raped me when I was younger and also said she needed to do what's best even though she has a child she should be looking out for and today she sent a letter to my house saying she doesn't care if I cut her out of my life she wants him in her life instead. She basically put down the warnings i gave her and instead of being a adult and talking to me she went to Facebook to get sympathy. I want to work stuff out I don't want to have to cut family out of my life but all she's doing is being a ass about it. Like if she didn't want my opinion she shouldn't have came to me knowing what our father did to me when I was younger. It hurts she rather have a relationship with someone who abandoned her instead of someone who actually gave a fuck about her. I love my sister but I'm not going to be treated like shit cause I was open and honest to her about what was the right thing to do. She has a child for fuck sakes she needs to keep her child away from that shit.
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Also I forgot to add she started the whole rant on Facebook a week after we had the conversation
Would you cut your sister out of your life if she did this ?
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