I had the exact same argument with my girlfriend (a bad idea) a while ago and asked for references to point her to on the IRC channel. I was given The Simple Truth and The Relativity of Wrong.

So I was about to write a very supportive response when I saw Mitchell Porter's comment. And this

(...) the children of post-Christian agnostics grow up to be ideologically aggressive posthuman rationalists.

aptly describes recent interactions I've had with my father¹. The accusation of narrowmindedness was present.

So, recurring conflicts with friends and family because of a newfound perspective on, well, everything? Values quickly changing as a consequence of new beliefs on what is true and what is not? Assuming we are in the they-were-right-this-time subgroup of this cliché, there must be smarter ways of dealing with it than making ourselves look crazy in front of the people who care about us.

¹ Except he's a raging atheist but has never propagated the consequences of this belief to his philosophy.