This is a really sad article. A lady who lost her partner due to his obsession with conspiracy theories.
https://www.thejournal.ie/readme/misinformation-5375100-Apr2021/
I also took on a strategy of acting like I was innocently asking open-ended questions, such as “why did that happen?” or “what interests you about this theory?” But too often I would be left vexed after listening to him for hours, and end up snapping at him with a “but why do you care about x, y or z?”
My partner’s defence usually came in three forms: freedom of speech for when he was rattling off racist, misogynistic, homophobic, transphobic and other prejudiced theories; libertarian “whataboutery” based on circumstantial evidence to the point where nothing said could be true or untrue; and projection, when I was deemed the intolerant one.