Regardless anyone saying they see too many minorities on TV and its makes them angry is racist.These sound like some pretty extreme circles to be honest. Maybe you have your finger on the right wing pulse better than me but this just sounds like standard "White Replacement Theory" ********. I wouldn't tar the majority of right leaning/right wing people with this brush.
You're probably right that it's growing, though. However, I'm not sure pandering to these kind of extreme views is the way to go. That doesn't mean to say that we should, as I said above, tar everyone who has concerns around immigration as racist white replacement theorists.
I think that's a pretty uncontroversial opinion apart from racists do not like being called racist.