And these are the kinds of interactions that people have in cities that terrify conservatives. Not the situation you described (although they’d be scared of that too), but the lesson you took away from it.
Just being around people that look, sound, behave, have customs, etc., different than you changes the way you view the world in fundamental ways. You may not even realize it is happening.
And most importantly, it makes everyone less afraid of one another. And this is how conservatives lose their power.