I hope you don't complain when people use social media or have LLM as their daddy to cope then :)
I would suggest that it's your avoidance of talking to strangers that makes you think this is how a lot of them think. And it kind of proves the point that society can suffer because of it. If you went out tomorrow and talked to 100 random strangers for 10mins I'd be surprised if any of them complained about minorities.
Chances are at least 20 of them would.
IRL I've never met one real person that has a 'racist uncle'.
But my personal experience has also been that the sort of people who ignore social cues and try and chat someone up who is wearing headphones while riding public transit or working out are generally less good.