My[21F] roommate[26F] left me a strange note

This is a really weird situation. Sorry if this comes out scattered. I'll call my roommate Sarah and her previous roommate Callie. We've been living together for about 3 months and didn't know each other beforehand. The first night everything went great and I thought we could potentially be friends. She did mention how crazy Callie was and claimed she "disappeared" and repeatedly stole all of her spaghetti. She's told me a lot of funny but very weird stories like these. I think it's easier if I put them in a list.

• She said her roommate was a drunk. I later noticed Sarah herself gets blackout drunk on mini boxed wines most nights
  
• She steals said wine even though she has money and is over 21
  
• Told me that Callie stayed up late into the night screaming and crying on the phone. I've since heard Sarah do the same thing on a few occasions.
  
• Told me Callie never cleaned the kitchen. Sarah never cleans the kitchen.
  
• Told me that Callie obsessively checked up on her location and freaked out if she went somewhere without tell her. Sarah has since done this with me...literally hours after she told me that story
  
• Sarah bakes gigantic and bizarre quantities of spaghetti. She eats a bowl and throws the rest away. This happens once or twice a week
  
• Sarah hides all her food in her room and has left me several notes accusing me of stealing it. I've never touched her food
  
• When she comes home from the grocery store she runs into her room and won't speak to me as she hides all the food
  
• She throws unopened cans of beer in the trash and became furious when I asked if I could have one since she wasn't going to drink it. Ever since I've noticed that is still throwing unopened cans away, just burying it deeper in the trash
  

There are many more but I'll cut it off there because this is getting long. The most recent thing was when she had a meltdown because she doesn't like that I reuse paper towels. Sarah uses huge amounts of paper towels and I like to reuse them if they only have water on them. It's not like there are piles of dirty paper towels everywhere--usually just one by the sink.
Sarah came to me and told me to stop doing it because it looks tacky. I explained to her that it doesn't really because the towels are clean and I fold them into small squares (for her). She started yelling and telling me that she can't believe she has to put up with me. Accused me of trying to "sabotage" her lifestyle. Not sure what that means. I think it's important to note that I'm the only one who cleans the kitchen. At this point, her lack of cleanliness is the least of my concerns with her so I just do it. In fact, I keep the entire apartment clean.
I left for class and got back to see that she left me this note (I'm typing it word for word): "[my name], I leave you this note as a last resort. It pains me greatly to say this but it has to be said if you ever hope to rise in the ranks. I believe you to be a selfish and trashy person. I've met your family and can't believe that you came from such regular people, when you yourself appear to be a deformed example of the sex study in which you decided to join this field. You WILL NOT leave paper towels on the counter. I repeat, again, what I have already said and that is that you WILL NOT leave paper towellettes (this is the spelling she used) on the kitchen island. Do it again and I will have no choice but to take action against you. I leave you this with love and kindess in my heart. I hope you can be mature enough to graciously accept that you have been glinding by."
Important notes: she's never met my family, we don't have a ktichen island, and her reference to "the ranks", "sex study", etc are baffling to me.
I have no idea how to even respon to this. Before she was just a bad roommate with some weird habits, but this is ****ing crazy and I don't know how she expects me to respond to this. Any advice for how I can deal with her for the remainder of my lease?

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tl;dr: Roommate left me a strange note after confronting me about leaving paper towels on the counter


Source.