Is my friend s girlfriend s meanness a part of her bipolar disorder?

My friend is dating a girl who s really mean. He attributes it to her bipolar. I could understand her lashing out and getting moody at times, but she has done things that I dont think were right.

She gives her opinions at inappropriate times. For example, shes religious, and decided to talk to my friend about Bible verses that are anti LGBT while our friend who is bisexual was there. Have an opinion, but heres the thing, she s been with girls! Shes a hypocrite.

When she gets angry, she s mean and disrespectful. As soon as she gets angry, she speaks in such an aggressive tone, and will start saying "f*** you." And she tends to get to this point very easily.

She s super clingy and demands attention. He doesn t go anywhere without her. He even takes her to school and lets her sit outside his classes. If she finds out he s with friends, she shows up, whether she s invited or not.

She yells and jumps to conclusions. At my birthday, she threw a tantrum and walked away because I was "making it all about me." she nearly ruined the night. The next time I saw her we got into an argument because she and my friend were being rude. I was calm and patient when I finally said something, and she immediately got in my face and screamed at me.

She also gaslights us. Look up gaslighting if you have never heard of it.

I don t like her, but my friend insists that we need to be patient with her because she is bipolar. I keep researching bipolar, and can t find anything that explains her behavior.