Yes, human history is full of examples of Climate Change events, and most were actually rather sudden. The Bronze Age collapse ending the Bronze Age was likely the result of sudden Climate Change. So was the sudden movement of masses of immigrants into the already rotten Roman Empire causing its downfall. And yes, the time of the witchhunt also corresponds with the advent of a cold period after a warmer period we call the Medieval Warm Period now. Burning people at the stake was supposed to bring warmth back. Crazy? Just look what happens now.
It appears that we haven’t learned the lessons of the 16th century and the dangers of stirring unfounded fears concerning changes to our climate.