I swear this always happens to intelligent people when they age

Me and my best friend are both gifted kids. Our families are all very smart people and so his mom and dad but for some reason, his mom is a really conservative conspiracy theorist (chemtrails, bill gates and the jews stuff) and his dad has weird spiritualist beliefs and rituals (cult inspired from buddism I think? I'm not sure) even though such stuff is forbidden under islam

Recently his mom randomly showed us a video where "they" are "vaccinating the fish". I was going to burst into laughter if I didn't hold myself so hard. My bestie is a progressive leftist, he believes in science, and he has a very materialist point of view. He says it's sometimes embarrassing for him when his family members do such thing in public

And the weirdest part is these are not caused by cognitive decline due to age. They still do understand everything pretty good and they can still process new information in a much more efficient manner than "average" people

My main idea about it is that skepticism can sometimes be a curse for boomers who did not have a source of knowledge to base their skeptic ideas on, and they are just not used to accuiring reliable knowledge from the web. Reliable knowledge often being in English and majority of boomers in my country not knowing English also contributes to that