If terrorism is a weapon of the weak, why was the Munich Olympics massacre successful and the Boston Marathon bombing failed?

When America was attacked on September 11, we didn’t just shoot a missile to Afghanistan. We sent the FBI, CIA, the Military, and took control of Afghanistan. But in Munich, they fucking surrendered. When the Black September terrorists demanded for Israel to release 236 prisoners arrested for Magdalena Kropovitzki attack and Ghawanimah raid, Israel surrendered.