It was needed because they needed to fight to win, if they backed off they would get attacked. Therefore, they needed to attack before they did for a better chance of winning.
One bad thing tha happened was that the Muslims views on Crusaders and Europeans as a people was drastically worsened. And it's obvious why this happened; they came to their lands and wanted to reclaim them despite not having any real and legitimate claim to these lands.
Answer:
is there any options our is this just the question
