If I’m trying to actually be realistic and understand it rather than just insult people—I think this Is due to a lot of different things, but a large one is that conservatives see liberals as “the ones running the world”. They feel oppressed, and silenced, and therefore lash out. This builds overtime. Liberals do not see conservatives the same way.
The simple answer is, generally no. Most modern Christians are far more moderate and flimsy in their beliefs than one might think. There’s always going to be extremists in any situation, but someone that identifies as a “Christian” in the modern world is generally shaped by the modern world. You’ll be hard pressed to find someone deny basic science in today’s world.