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One person was killed and three others were injured Tuesday morning when a suspected Islamist attacked people with a knife at a train station outside Munich, Germany.

Witnesses reported that the attacker, who has been identified as a 27-year-old German national, had shouted "Allahu Akbar," the Arabic phrase meaning "God is great," during the assault.

On "Fox and Friends" this morning, Dr. Sebastian Gorka shared insight on this "disturbing" attack and what it means in the fight against radical Islam.

Gorka noted that knife attacks have become more common, particularly in Israel, suggesting this is a new Islamist tactic.

"They're not going for big spectaculars, they're not going for IEDs, but they're going for low-tech knife attacks," Gorka explained.

He added that the shouting of "Allahu Akbar" is the "smoking gun" that shows the attack was motivated by an Islamist agenda.

How do we combat the threat of radical Islam? Ainsley Earhardt asked.

Gorka said the first step is actually acknowledging that the enemy is radical Islam. Second, we must empower our Muslim allies. Third, we must delegitimize their message.

Get more insight from Dr. Gorka above.

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