Today’s Republican Party is not a conservative party, it is a reactionary party, and it is now at the peak of its political power. Conservatism wants to maintain the current systems that make sense and remove what liberals refer to a Progress, it hates progressives. Reactionism claims "nothing makes sense anymore" and seeks to destroy everything new in an effort to return to a previous era.
Reactionist experience despair with the current situation and find solace in their memory of a previous golden age. They imagine a time in the past before "everything went to hell" and they desire to turn back the clocks. It is not simply a conservative preference for things as they were, but a actual loathing of the way things have become. That coupled with an overwhelming desire to return to the past in a attempt to set thing right, and a willingness to endure destruction just to achieve that end.