It is true that Hogwarts was under attack several times:
* During the Battle of Hogwarts: The castle was heavily damaged during the final battle against Voldemort.
* During the First Wizarding War: The castle also suffered damage during the First Wizarding War.
However, the castle was always repaired after these attacks.
It's important to remember that Hogwarts is a magical place with powerful defenses, and it's unlikely that it could be permanently destroyed.