Why did the crusaders want to seize antioch prior to moving on toward Jerusalem and what would have been the likely result if they had not taken antioch?

The Crusaders sought to seize Antioch as it was strategically located along the route to Jerusalem and served as a vital stronghold for staging further military operations. Capturing Antioch would provide them with resources, troop reinforcements, and a defensive position against potential counterattacks. If they had not taken Antioch, their advance toward Jerusalem would have been severely hampered, likely resulting in logistical challenges, increased vulnerability to Muslim forces, and a diminished chance of successfully capturing the holy city.