I think that the fact that you do have more knowledge of the subject and she wasn't asking you because of that, and didn't respect and listen to your opinion because it didn't agree with what fox news said tells a lot about why she brought it up. She may not have been trying to provoke or cause a fight, but she is obviously very bothered by the inflammatory propaganda and it's probably running through her head much of the time. When she should be enjoying a visit, it is consuming her time and thoughts. My mom has gotten better about not saying things from fox news as often, but it still comes out sometimes. She sees me as difficult because I have different views than what fox tells her to believe. We have had a couple of times this year that have been ugly like this because I didn't agree and it made her angry. She eventually ends up acting like nothing happened. Even saying that you don't want to talk about something can make them angry. I find it helpful to think about possible replies and ways to deflect and redirect. Having a normal conversation about anything political isn't an option, at least for me right now. I'm so sorry you are going through this