Who cares.
They weren’t looking for your drugs of guns or kids in the basement. They were looking for a suspect. Even if they saw something else in the process it would be in dismissible in court.
If the terrorist had a friend, or it was an empty house that he was hiding in the terrorist can safely hide in there until cops come back with a search warrant?
Probable cause is a powerful tool. It’s good when its properly used. It’s bad when its abused.