AITA for assuming my mom has a mental illness after she kicked out my stepdad and husband for “being sexist against women”?

I had always been very close to my mom. She was always there for me. When I was 16 my dad cheated and left her. She was heartbroken. It took a couple of years for her to be OK and trust people again. She was honest with me about everything and did her best to take care of me. I’m 24 now and she’s still the most important person in my life. She had met my dad when she was 18 and married him at 23. She married my stepdad 2 years ago and he’s a very nice guy. My husband was part of the family too basically. I’m not going to lie, they got along great until this incident. <br><br>My husband and I bought a house last year and our lives have been pretty normal. I’m a teacher and he works at a cinema (he works part-time since he’s studying) and I work full-time. <br><br>It started about 3 weeks ago. She had always been very into feminism and women’s rights but she became obsessed with it. She started using phrases like “men can’t be trusted” and “women are superior to men”. I thought she was just going through a phase but she didn’t stop. She started reading some pretty weird books and following some radical feminist pages on Facebook. She started saying weird shit like “all men are misogynists” which is just not true. My stepdad is the nicest, most caring guy ever and my husband is very kind as well. I know it’s not true and she’s deluded. She became extremely defensive and started lashing out at me for saying men can be “good”. She offered to pay for therapy and told me I was “brainwashed”. She basically fell into a rabbit hole and went crazy.<br><br>Then last week she kicked out my stepdad because he told her to be more careful with driving. He said it in the nicest possible way and was genuinely concerned for her safety but she flipped. She kicked him out and accused him of “sexism”. Then she told me to tell my husband to never come to her house again because she thinks he “hates women”. I think she saw him checking out another girl (who was very pretty) when we went out for dinner last week. The incident freaked me out. A few days later, she told me that she hated my dad for cheating and said that she would never date or marry a man again. She said that she “hated every single man on this planet”. It got to the point where she wouldn’t let my stepdad and husband inside the house. When my husband tried to talk to her yesterday, she started freaking out and told me to get him away from her house. She called the police and tried to have him arrested for “harassment”. I talked the police out of it but the incident freaked me TF out. She’s not the same person. The weird part is that she’s still her happy and bubbly self when it comes to anything else. It’s very strange. <br><br>I think she has radical feminism. She only goes after men for being “sexist” and not women. I’m just worried because she’s not the same. I’m seriously considering getting her therapy but I’m just very concerned. She does run a small business and she’s perfectly fine when it comes to anything else. What the hell is wrong with her? She seems to have radical feminist beliefs. I just want her to be happy. I just want her to be her old self.