I honestly think conservative media just tries to start as much shit as possible so they have something to talk about.
At this point they probably start out by picking some slightly complex idea that's objectively correct and then work backwards to find a way to disagree with it.
The issue is that these changes are beneficial to society but detrimental to them personally. So they try to rationalize their stance without sounding like selfish assholes.
I think it's more that the right wing media tries to identify grievances and then provides rationalizations for them. I don't think this is an organic, ground-up process.
It isn't even detrimental, it is just different from what they prefer. How does a bike line on a road they probably don't even live on really effect them? It doesn't.