You are judging by European standards. To us, Fox is extreme right wing. But by American standards, it's merely right-wing, no extreme. Everything is shifted.
The extreme right-wing are the ones upset that Trump isn't trying to expel all Muslims from the country like he promised, and stockpiling guns and ammo for the time when Obama's secret army rises up, overthrows the government and starts trying to round up Christians for the gas chambers. They are pretty nuts.