Sometimes even discussions have fact verses opinion involved in them & even in discussions some people feel that their point of view is the only one that is right & get very defensive (nasty) about it when they are disagreed with.

Lol....one time our hot water heater went out & I had called my mom about it because we weren't in a good place financially to deal with it. Discussing hot water heaters. My mom got wierd & hung up on me. We ended up going to Lowe's & buying the cheapest water heater & paid for it over time (no interest)...my mom got over herself & called back a few days later & said...."I've been thinking about the water heater....." I nicely said we already took care or it.....end if discussion. But I learned growing up that even in discussions fact vs opinion can be goinf on under the discussion & can still be a cause of discussion problems especially when there is one side of the discussion that has a serious need to be right & becomes defensive about it.

Definitely better not to be a part of discussions lime that as you have found out....experiences like this will help you become aware if situations like this earlier on & avoid them sooner....it is a learning process because many times we iften think "what can it hurt to just hang around without really getting involved (until the one time we get sucked into involvement). Sometimes experiences ars the best way to learn.