What negatives happened as a result of the crusades?

Answer 1

The answer depends on whose side you were on. The crusades were a time of much death, hardships and poverty on all sides as in all wars.

In Europe, most of the important people across the lands joined the crusades and travelled to the Middle East to fight and "reclaim the holy land". Due to this large exodus, much of the wealth went with it, never to return and Europe became more lawless and poverty-stricken as a result.

For the people living in the Holy land that didn't want it to be reclaimed, it was much the same story. Many would have been displaced from their homes, enslaved, executed as barbarians or unbelievers. Others raised armies and tried to repel the invaders, ultimately succeeding.

There wasn't much to be positive about the 200 or so years of this period in world history. The Europeans generated additional trade, but lost to the Muslims by attrition, which cost both sides a huge amount.