It’s the natural conclusion of the strategy republicans set into motion to manipulate their base.
It started just after Watergate. Nixon was facing massive calls for justice from both sides. Republican think tanks realized that their base of conservatives consumed news from all sources that informed their mostly unbiased decision to hold their guy accountable. So those republican think tanks devised a plan to create a conservative news outlet that explicitly demonized other news so that the conservative base would never turn on one of their own again. That strategy was realized in the 90’s with the creation of Fox News.
Since then, conservative media has been slowly transforming politics from the perspective of the average conservative into a team sport, where the main motivation isn’t “who runs the country better” but rather “my team is better than yours”.
It wasn’t so pervasive 20 years ago, but conservative media has found themselves with a base that now only responds to the outrage they’ve been conditioning them with, and that has created the raging confrontational assholes you see today.
Being a conservative doesn’t mean what it used to. And that’s because the Republican leadership robbed conservatives of that in order to maintain control of their base.