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Monday's alleged terrorist attack in Berlin left at least 12 people dead and dozens injured after a truck plowed through a Christmas market.

And that was just one of three alleged terror attacks in Europe on Monday, along with a shooting at a mosque in Zurich, Switzerland, and the fatal shooting of the Russian ambassador to Turkey in Ankara.

Dr. Sebastian Gorka, author of "Defeating Jihad," joined "Fox & Friends" Monday to discuss his views on the concept of "lone wolf terrorism."

Gorka said all of Monday's attacks are "absolutely" related and not a product of lone wolf terror.

"I completely reject it," he said. "Lone wolf is a concept designed to make Americans stupid. There is no such thing as lone wolf terrorism."

He said all terrorist attacks -- the Boston Marathon bombing and 9/11 to name just a couple -- are connected through the "ideology of jihadism."

"People aren't just sitting in their basement one day, go on the internet and suddenly become jihadis; that is bogus," he said. "They buy into the narrative of jihad. They choose that lifestyle, and then they kill the infidel."

Watch the above clip, and share your thoughts on Gorka's remarks.

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