A lot of boomer behavior and beliefs make sense when you realize this. A lot of them were raised by whatever garbage was on TV due to neglectful parents.
Do yourself a favor and watch an episode of one of these shows some time. MASH, Gilligans Island, the Andy Griffith Show, etc. Pure escapism. Simple black and white moralistic protestsnt values.
Now realize that when boomers reminisce about a time when "townspeople knew the local cop" that this never existed. They are literally just going off what they seen on the andy griffith show as a kid during their formative years.
Yes they did get a cast from other Asian countries to represent Koreans, however I think that most issues we would have were due to ham fisted producers who didn't "get it".
It improved significantly over the years, and although retrospectively it might seem racist, compared to the other shows listed it was fairly progressive.
Don't watch it now. Don't watch it as a progressive piece of programming, you will only be disappointed as its over 50 years old, and it was battling stereotypes of over half a century ago.
And yet even now its far more progressive than most Republicans.